How to repair an LCD monitor

Often the backlight inverters fail due to bad capacitors. In this video I'll demonstrate how to replace them.

[@mickeyflowers]

Fry's or Radioshack, the good ol' days. Both are gone now. Thanks to both of these companies for all the help and supplies over the years!

[@soucevit]

I don't mean to be rude, but there is one important thing you have forgot to mention. Capacitors in power supplies are under heavy load, which makes them more likely to heat up. So cheapest capacitors will soon simply give up and leak, explode or jast stay intact while loosing their parameters. There is simply need to use at least 105°C capacitors to extend live of power supply. If you will just go to the store and ask for capacitor 470uF@25V you will get 95°C one. So you need to mention you need 105°C one. And stay away from suprisingly cheap 105°C caps from internet. They could be actually 95°C ones only with different label.

[@richhirth9445]

I've never heard this before, so thanks for the information.

[@stefani.5737]

This is actually not rude at all, its really useful info, thx man.

[@carlosedwardos]

Martin M - I would not necessarily say that Panasonic FC/FM are superior to Chemi-con KMG, (aka Nippon Chemi-con, aka United Chemi-con) and let's not forget the other 4 big names in electrolytic capacitors - Rubycon, Nichicon, ELNA, and Toshin Kogyo. All of these firms are premium Japanese capacitors, and all have competing series that are basically a coin flip as far as which brand is superior in a given ESR, capacitance, and voltage. Just make sure you buy them from DigiKey or Mouser, otherwise you are likely buying counterfeit Chinese copies of these brands!

[@Elite7555]

And they can be very dangerous, because they can hold high electric voltages.

[@headstrument7657]

Vít Souček helpful information, thank you!

[@The8BitGuy]

I'm pretty sure these particular caps are just for buffering the 12V side of the circuit. So I don't believe the "Q" is a consideration on this part. However, it might be on the high voltage side that would be dealing directly with the lamps and would be oscillating at high frequencies, but those are using ceramic and/or tantalum caps.

[@Bort_Simpson]

Oof

[@Westkane11]

Great video. My electronic teacher from college, told me, that one should always cut the pins on the electronic components before soldering the pins onto the board, because if one cuts a pin after it has been soldered, one risk making small crack in the soldering.

[@IFailFirst]

+Westkane11 Not a good idea. The leads (or pins) can help having too much heat go to the component. Also, unless you are using a seriously dull set of snips, there will be almost no force applied to the solder joint.

[@semloh1870]

I really like David Murray's tutorials and his videos. Such quality content- please keep making these videos- fan from the UK.

[@mohatheace]

What's strange for me is that they sell capacitors individually packaged. It's a complete waste. Where I live, I can just go to an electronics store and buy as many capacitors as I need; the store buys them in bulk, then they just pick them out at the point of sale. I get them together in a paper sack and they waste less materials.

[@PCandJamisMinecraft]

I got some from RS. They came in a paper sack... and they were in a plastic bag in the paper sack. why on earth would they do that?

[@worldhello1234]

They don't waste it, they charge for it. =)

[@tttc]

I remember in high school we'd get some electrical components out of ~150 liter bags.

[@yunski_gtd]

Woah, nice

[@Xavier_Ns]

Rip radio shack

[@nimalperera5454]

You are indeed a good teacher. You explained everything so clearly. I have a monitor which lights up and then goes off within a second. Now I will try to repair it as per your advice. Please touch upon repairing the back light panels with a new video. You said 9 out of the 10 is always the issues with back light.

[@Mardoro124]

Did it work for you?

[@mrmike04st]

One quick suggestion. If you want to cut the leads, do it before you solder. If you cut them after you solder, you have a chance of fracturing the solder joint. If you cut them after you solder, reflow the solder again to make sure that any shock to the joint is dissipated. (Reference the IPC J-STD-001).

[@okaravan]

Oh my god! There are still exist persons knowing about IPC standards! And knowing how to use them!

[@sammymorini9748]

LOL i repaired the same (similar) monitor with the same problem.... repaired 3 monitors so far... ALL HAD THE SAME PROBLEM total cost: approx. 12$ ...

[@restlessfrager]

But how much is soldering/desoldering equipment?

[@sammymorini9748]

not expensive, 20-30$ tops

[@bryanl1984]

It's a cheap fix but, one that shouldn't have been needed. The caps from the 80s to early aughts are all substandard garbage.This is a huge problem with the retro console scene. They paid pennies for these parts, its irritating they didn't spend a few cents extra for one of the few parts that fail the most with use - caps are the closest thing to moving parts electronics have, apart from a few switches obvc. Obviously thry could care less if customers get screwed after they get their money but, damn, you think they'd be at least a little ebarassed. Iv e seen capacitors from the 20s through the 60s operating with extreme current and voltage be totally functional. Every time people start refurbishing old teletype machines and telecom equipment, they assume they'll need to recap the system but find everything working.

[@rotatingcat1957]

did 1 monitor cost 4$?

[@captainprototype187]

Sammy Morini, can you replace the vga cable that is soldered in? I found a Nuevo montor but smebody cut the vga cable for the copper. Ther is still a piece left so I thought to try to solder the 6 wires to a separate vga cable. Can this be done?

[@SkyHeye]

Even when the capacitors are not bulging/leaky they can be faulty, as you have shown. I use an ESR meter to do in-circuit testing. Best investment in years! Latest job - PSU, 400v 250uF caps totally open circuit, looked as new. Ordinary multimeter (on ohms as charger) agreed but caps needed to be pulled from circuit board to confirm. (Equivalent Series Resistance meter - great for testing 'goodness' of electrolytics) Cheers. Paul F.

[@GigaPlaya]

I'm thinking of buying an ESR meter. What model of ESR meter did you get? Can you give us the web address you bought it from?

[@LilyBloomVee]

I own a HannsG 16:10 monitor which recently had a dead backlight too. A year later when I randomly came across this video I thought that this might be my problem and indeed it was. I had bought new capacitors and replaced every capacitor just to realize this really was the problem. Thank you for uploading this video and also to give me the courage to repair my monitor like this.

[@kenblack4802]

Very happy with your presentation, speed of presentation, and clarity with your presentation. It's just as I want them, GREAT JOB!

[@AmyraCarter]

Have you ever covered the repairing of a CRT monitor? Would like to see that.

[@carlosedwardos]

As someone who replaces capacitors for a living, I would give this video pretty good marks, with the main critiques being that those NTE capacitors are junk, stick with the 6 premier brands of Japanese electrolytics - namely: Rubycon, Nichicon, Chemi-con, Panasonic, ELNA, and Toshin Kogyo and get the 105°C rated ones, and get them from an authorized source, i.e. DigiKey and Mouser and that's about the only authorized sources in USA as counterfeit caps are at epidemic levels! - Also the ESR of the originals needs to be matched when selecting capacitors. Oh, and get a decent soldering iron, not that $15 thing! - lol

[@TsatsikiNinja]

burrito rustler that's what I was thinking. I repaired my old monitor a while ago and at my research I read that at the factory they put in caps that are rated too low so they will die faster.

[@OhWaker]

Newark/element 14 is also a good place to get legit capacitors.

[@spacejihadist4246]

I have a 3$ soldering iron and it still works. I bought it back in 2009 and I've been using it everyday.

[@Dukefazon]

Hi David! I bought an old Xbox and as I'm trying to find all the possible problems with it I found that 2 of the caps are bulging on the mother board. Your videos give me the courage to mess around with things like this. Thank you!

[@sal8s]

you rock. I'm a pc guy and you have shown me how to solve so many more problems than most pc tech guys. keep up the good work!

[@elkillerx]

Tried this out on my monitor before throwing it out... and it worked! Thanks.

[@pootwoot2978]

Anthony , your gay

[@caleb1736]

Lol poot woot HOW IS HE GAY????????

[@adrianharu7503]

I'm not a tech guy but your explanations and video was very helpful. Thanks Adrian

[@TrueThanny]

The main reason you'd need to replace capacitors is because cheap Chinese ones were used in the first place. The big benefit of buying online is that you can select the quality brands like Nichicon or Panasonic, which is definitely what you want to use, to avoid having to repeat the repair later on. Case in point, a Viewsonic monitor I got for my father was experiencing a several minute power on delay after about a year of usage. I removed and replaced all the cheap Chinese capacitors with Nichicon replacements, and it's been working ever since (well over five years now). If I had just put in more cheap Chinese caps, I might have had to repeat the repair a couple times over by now.

[@TylerSteven9]

Be careful cause there's lots of counterfeit caps online too.

[@retropolis.player.4]

I fixed an LCD tv that would not turn on. It was three capacitors that blew. I used some capacitors from an old (dead) microwave and computer power supply. We used to have a radio shack but they got bought out by "The Source" and with in the last few years all their components have dried up. (as in no longer carrying them) Online is my only way to get them. So I usually tell people I can fix there stuff for cost and tips.

[@user-qo8js3qk5z]

Thanks for teaching me a new skill.

[@novaknovakovic1585]

Not certain about the points made but ,if anyone else needs to find out about small appliance repair try Saankramer Electronic Magazine System (just google it ) ? Ive heard some interesting things about it and my cousin got cool results with it.

[@mabuchild]

I am this one, the color is not correct.Although simple, but tell me how to open this model of lcd, Very happy to see this video. It helps me a lot.

[@Sama3L]

Desoldering gets more easy if you first retouch it with some fresh solder and then use wick or a desoldering pump. That way you have the components loose much quicker. Almost every modern circuit board is soldered lead free what also makes everything harder. In repairs like this I always use lead containing solder because it handles so much better.

[@FirstLastOne]

60/40 Leaded solder for the win.

[@Morjesta]

thanks for the tip! i just got a second hand monitor, it was cheap and it works ok, but its making a high pitched noise, that you think is causing this? Is it worth trying to repair? Thanks!

[@joeylantis22]

Who else is on an 8-Bit guy binge?

[@Computist40]

+joeylantis22: **Waves** I am I am lol.

[@zuluecho5886]

Meyh

[@jm036]

*iBook Guy

[@TechDude3000]

me

[@_kcy033]

Me

[@MiettedeThonTomate]

Speaking about CCFL lamps, a video showing how to replace those for LEDs backlight would be really great!

[@zakaz_tv]

Hi Master. Just imagine I'm your online student and I'd like to ask something else, can I use an Integrated Circuit: 45580 JRS DPOD22 instead of the Integrated Circuit: LT FOZ OB2269CPA ??????

[@derekchristenson5711]

This is great info that I could really see using. I wish I'd known how easy it was before I threw out the last two LCD panels that went dark on me... also, I sure wish there was still a Fry's Electronics or Radio Shack to go to. :-(

[@hikaru-live]

If you are given bad monitors often, start stock some Japanese (Nippon Chemi-con, Nichicon or Rubycon) low ESR, 105 degrees Celsius rated electrolytic capacitors with common values. I always have a small stock of those caps. Also it is usually okay to step up the capacitance or the voltage rating.

[@kerkjones3693]

I d love to watch a video by you on how to repair CRT tv keep up the great work

[@zakaz_tv]

Hi Master, I had a broken ceramic fuse "F801T3.15A/250VAC". But I can't find this type of fuse in my city. Could you tell me PLEASE, can I use the fuse ""F5A 250V or F4A 250V" instead of it ???

[@swagiyo9801]

Well... You can, and it will probably work fine. But the original fuse is burning over at 4 amps and the one you have avalible is burning over at 5 amps. The problem with this is that if a compponent shorts, it will first stop heating up until it draws 5 amps, therefor making it more likely to catch on fire. But the chance of that happending is nearly zero when it's just one more amp. So, yeah. Go for it :-)

[@zakaz_tv]

Thank you, Master.

[@MrOnlyzohaib]

Don't do it buy a fuse with more amps but not less

[@windows9834]

it was so easy to take apart my monitor i just throw it at a wall

[@BurnedPinguin8630]

lel lul lol

[@TheRedCap]

Windows98 no, you didn't throw it at the wall you threw it out the window ( ͡° ͜ʖ ͡°)

[@windows9834]

THEREDCAP ok

[@SSBSfanboy]

+THEREDCAP Make sure the window is at least 10 feet from the ground before you do it though.

[@windows9834]

no just no

[@TariqYasiinProd]

Thank you so much, old life saver! You always make my day! I watch your videos every single day and rewatch them at night lol

[@flexmann2148]

Yes, you answered my problem to my dell lcd monitor. replaced the capacitors, and it works. Thanks 8-Bit Guy.

[@LOGINCLtv]

I am INSPIRED! I'm not going to open her up yet, but my ACER has been borked for a while now. It's sitting shamefully on the floor while I'm tied to using my laptop. But soon... Í'll find somewhere that sells caps in this town.

[@TheEmeraldMenOfficial]

Oh hey, my school uses the same model as the one you repaired! Thanks, i always wanted to know what ports it had underneath

[@1Rowdy1derful]

You should have covered the temperature rating.

[@tenshi7angel]

Yeap, aim for 105c instead of the standard 95c caps.

[@zo1dberg]

Meh. This channel will never take off.

[@goeiecool9999]

One time I had a pretty decent screen's backlight go out. I opened the screen and found capacitors that were bulging. In the time I was waiting for replacement capacitors, I had the monitor laying on the ground, screen up. I ended up dropping something on it. When I replaced the capacitors the back-light turned on buuuuut.... the LCD was broken from the drop :/. That was my first "successful" electronic repair ever... I was pretty bummed out.

[@addydiesel6627]

🎶Faate... , up agaaainst your wiiiilll🎶 Have you heard that song?

[@omega-max5347]

I'm sorry but this is hilarious.

[@prmicrotech]

I literally have that same screen. Bought it on New Egg many years ago... Nice video thank you for all your content... Love your channel.

[@Geerladenlad]

Great video! I found Mouser by calling the 800 phone number of a local electronics store and the rep recommended them. I wish I had seen this video first!

[@djbassaus]

Blister packaged capacitors.. Crazy!

[@omegafolf]

Surprisingly how dated this video is with it being 4 years old as Radio Shack is all but gone.

[@newagederpderp]

FUCK OFF

[@evknucklehead]

@@un_simp1127 There are still "Radio Shack Express" and "Authorized Radio Shack Dealers" around, as well as their online store, but full fledged Radio Shack stores are essentially gone. Most of these "Express" and "Dealer" locations also don't have the full selection of products in stock, and aren't in nearly as many locations as they used to be.

[@metelicgunz146]

We still got Fry's and Microcenter

[@alastair_the_lyon]

Yea. It sucks but we do got Microcenter!

[@kunka592]

I also had to repair a Viewsonic LCD that had bad capacitors in the power supply. It still works. Did the same fix for a Samsung TV and it lasted a few years until the video board died. Unfortunately, even used, those boards cost way more than they were worth at several hundred $, so we just bought a new Sony TV instead.

[@hateeternalmaver]

Hey David, I wonder if there are any similar dangers and things to watch out for like with PC power supplies? I do not dare touch these but this sounds like something I might be able to tackle and would try

[@edwinjamero]

the problem in my aoc monitor is the signal inverter board, not the power supply board. Do i need to replace the whole signal inverter board or only parts of it?

[@dvha87]

So you have 6 old capacitors (on your hand at 3:15) replaced and you added the additional one, makes 7. At 3:16, I counted 8 (not including the 450 V 120 uF) capacitors, is there a reason you didn't do the other one or two (possible those 2 at 12 o'clock at 3:16)?

[@HHIMgary]

My monitor is a 27" Viewsonic. The whole screen just went all white one day. I have took it apart and cleaned all connections, and inspected all capacitors-they look ok. Same thing. Tried changing the power supply board with one I got off the internet but it did the same thing. Now I am going to change the capacitors and see if that helps, if not it's in the garbage. It's a white screen but you can barely see the image of the sign-on displayed.

[@alljoy6541]

Super stuff, I started collecting capacitors, cause i have seen this problem with LCD txs and monitors. Sometimes can just order the board and replace it, as it has a code that can look up online. We live in a throw away society, those old people who used to repair must be turning in the graves! As the saying goes.

[@The8BitGuy]

Not a bad idea.. I've re-capped G5 systems before. But I don't have any G5 iMacs anymore. If you want to send me yours maybe we could arrange it. :-)

[@gatetoheaven6954]

I have a Biohazard Pachislot machine. The screen is very dark and when coins are inserted and the reels begin spinning the screen blanks out and begins flickering. Do you thin replacing the capacitors will solve the problem? Thank you. Tom Crown

[@richard1113]

Huh. I would have never guessed that replacing some capacitors that appeared fine were the problem. I have a Samsung T240HD that died recently. I'm going to give it a shot.

[@Leonvolt28]

Richard Forester how did it worked out for you?

[@almog12345678]

I have a monitor with the same problem but mines statrs after a minute or two, and doing a buzz noise, do you think replacing the capacitors will fix this? If so, can you please explane how can I know the type of the capacitor to by and all the terms of it? Thanks!

[@Prosthetics89]

What about if your screen flickers when there's bright blues on the screen? Esp when you just turn it on.

[@mike104740]

I have an original xbox that does not power on and I was not able to spot any leaking or bulging capacitors, so would replacing them work probably?

[@floriandaler5327]

mike104740 Look if there is a blown fuse. Those are Those cylinder-like glass thingys with a metal Cap on both ends and if you can't See a wire in them, they are prabably blown.

[@lostmic]

So umm... now the monitor stays on but it has lines through it nothing recognizable and it seems to after 30 seconds start to white out the entire screen, but when it started doing that I quickly unplugged it. I was really hoping to get this monitor working. Any Suggestions? Also my board was not as simple as yours my compactor was in the middle of of a bunch of sliver lines not just off by it self. I made sure it was the right compositor with an up volt from 25 to 35 everything else was the same. Old NEC AccuSync LCD 224WMX I screen shoted before and after shots of everything, it might be my soldering I am really bad with it but I did my best to stay focuses on what I was soldering. Old NEC AccuSync LCD 224WMX

[@castin5244]

I have an Acer H236HL monitor that has a strange temporary "burn in" effect where whatever was on the screen last will kind of stay there for a while. It's transparent so I can still see everything Im doing, but it's extremely annoying seeing a faint overlay of google chrome for an hour every time I play a game or something. Any ideas what it could be? it's an LED backlit monitor with an external power supple so I don't think there are even any capacitors in it.

[@233kosta]

Generally speaking it's a good idea to get higher rated capacitors in both voltage and thermal tolerance. This will ensure they are under less relative stress and they ought to therefore last longer.

[@captainprototype187]

can you replace the vga cable that is soldered in? I found a Nuevo montor but smebody cut the vga cable for the copper. Ther is still a piece left so I thought to try to solder the 6 wires to a separate vga cable. Can this be done?

[@sambalsamurai9672]

Awsome video and good logic! Another question: My eizo 30" CG303W emits soooo much white light (even at the lowest brightness setting) that I get eye pain and headache after using this monitor. Never had any issues with other/ older EIZOs especially those LED monitors are so calm and good for eyes, But now that I have the CG 303W I want to figure out how and if there is a way to dim the backlight further down... Any help would be welcome thanks!

[@infinitecanadian]

Do you recycle your old electronic components?

[@AJ-on-youtube]

Did you replace ALL the capacitors?

[@carlocanlas]

I recently bought a used Dell U2413 monitor. It was fine initially but after a few days, it started to shut off within an hour of use. It would then turn back on after a few minutes. If used within a cold room/environment, the issue doesn't persist. Could this be caused by faulty capacitors as well?

[@eglandon16]

Watching this seven years after it was posted and laughing because good luck getting caps from Fry's or radioshack

[@PokemonClassicMaster]

Now you can’t even go to both places anymore

[@Ragesauce]

@The 8-Bit Guy I had a question for you, regarding older laptops such as the Compaq LTE you own in your best laptops for dos video. I was wondering if those screens happen to go out, but still produce an image and don't have any cracks or anything in them, but a portion of the image isn't showing, is it possible to fix them? Thanks!

[@emprsnm9903]

Since you've been waiting a few months, I'll chime in here. On those older LCD displays, partial screen blanks (with no cracks) were often caused by a partially broken display ribbon cable to the lid. A couple interrupted data lines carried by the cable could cause whole chunks to not appear, all the way to 50% or 100% blank screens. Often verticle bars missing, or bottom half, etc. The LCD might have something wrong with it, but the lid cable is a flexing part that does fail, so I'd start there, and having a doner parts machine helps too.

[@marinacelada3246]

Hi! I own an Acer Extensa 5230, and I DON'T WANT TO THROW IT AWAY, as almost everyone has suggested me, but it's got a problem with its LCD: if I open it too much (more than circa 45°) it becomes black (you can barely see the silouhettes of elements on the screen), and red and green latitudinal lines of pixels have started to appear on the left side (above the left grip of the screen). I know that I can find a used screen for circa € 80, but I'd like to repair it. Any suggestions?

[@emprsnm9903]

Based on your descritption of the symtoms; I have to believe the lid/screen Cable has a break in it where it bends at the hinge point. Cables can be hard to find for any laptop, because they are almost always model specific. If you can find a replacment cable for €10-€20, you might be able to take apart the screen and lower portion to swap out only the cable. Just take your time and be carefull handling the inner screen portion. It's not what I would call 'easy', as manufacturers like to hide the screws and platic snap-together stuff. It's easier than repairing a broken phone screen, but you need to have a light touch. If you've never taken a laptop screen apart before, be prepared to buy a replacement lid/screen in case you snap something in yours. Just FYI, and good luck!

[@marinacelada3246]

@@emprsnm9903 Thank you very much!

[@salamanderteeth6414]

My monitor fell and now the image is a bit distorted and the screen is green instead of black when you turn it on. Any hope for this problem?

[@goqwertygo]

a friend gave me a samsung 243t 1920x1200 monitor with a bad inverter board. Since the inverter board is separate from the main power board is it possible to convert it to LCDs with out the inverter board?

[@RuijieZhou]

Hi, I have a Dell ultrasharp 2709w, have some problem of stay working. It can't be turned on sometimes. Unplugging it for a few hours always gets it working again. Could it be capacitor? If so, which one could it be? Thank you very much

[@jaser3312]

Cheers, worked a treat for me.Cost me all of $6AUD for 6 capacitors. Monitor revival at it's best :)

[@paulhatch8451]

I was given a 23" go monitor hp2310m. I took it all apart. Right down the the backlight, everything looks fine but the same board you worked on in this video has white discoloration on the board. Should I just change the board?

[@DerSergeantDestroy]

This might be a stupid question, but why exactly didnt he change the huge blue capacitor at 3:13?

[@general123ist]

I have exactly same problem. none of the capacitors seems to be failed. what could be other reasons? how do I check . Or I just replace all existing capacitors anyway?

[@dougharlow6037]

how do you test each capacitor to cut down cost and labor and to be more precise? And what kind of solder to use? I have a Dell™ UltraSharp™ 2407WFP monitor that has power but black screen. I took it apart and can't see any hot spots or bulges in any capacitors.Thanks

[@jese5207]

+The 8-Bit Guy hi! so i'm electrician but i have no experience with screens. so. my screen is dimmer than my 'main screen' and yellowish, i dont remember the hours of panel. but would that dimmines and yellowish go away with just changing the capasitors or do i have to replace the light?

[@GmGarlo]

so if the capacitor i took out has a value of 220 uf , can i use one as high as 1000 uf ? if not , what is the max i should go if i don't have a 220uf ? Great video by the way!!!!

[@emprsnm9903]

On DC power supply (monitor) circuits, I've plopped a 470uf in place of a 220uf temporarily to see if it fixed the problem in a pinch. Then if it the monitor or whatever came back to life, I ordered the correct capacitance and put it in there permanently and closed it up. Usually you cant go too much higher because of physical constraints, but during troubleshooting while its opened up it can tell you if ordering parts will be worth the trouble.

[@joshualepon5676]

I have a question, why did you not replace the big blue capacitor? The biggest one on the bottom right? Which capacitors should be replaced?

[@retropcs88]

The big blue capacitor is a input smoothing capacitor. They do not fail as much and it Is not worth risking shocking yourself.

[@JasperJanssen]

You appear to be changing low-ESR caps in a SMPS for non-ESR models. That's... suboptimal.

[@chongshenchang9367]

Sir, here I don't have issues with capacitor but the power transistor, blow again and again after replacing. What may be the problem?? Pls help..

[@retropcs88]

Capacitors. Might be drawing too much power when they are bad and are blowing the power transistor

[@johnnygoodface]

I hate this new way of displaying KZbin's view counter! 2K! That looks misleading... Sorry I had to vent! ;) Liked the video :)

[@uchihasurvival]

Wait, so voltage matters over capacitance? Because a year ago, I replaced four blown 16v 1000uf capacitors with 25v 1000uf capacitors on my motherboard, and my computer is still running just fine. If so, then why is my motherboard still working?

[@88081jeffreyg]

How hard would it be to replace a broken micro USB port on a Kindal ?

[@jleon87]

Hi iBook guy!, i have an iMac G5, is not working I think by the capacitor you know how to fix it?, you can make a video?

[@rikudouray]

vertical and horizontal lines every three sec. what is the cause by this? I owened a 1 1/2 years old asus vz249h. Should I buy a new one?

[@niteflash06]

Would this work on small LCD TVs as well?

[@lvl3472]

could it be a logic board problem and if so what would be the common problems with them my monitor wont work on any other setting other than 60 hz and it flashes a white screen often its listed as a 144 hz monitor but will not play at that setting for long before blinking white screen i allready bought a new power inverter board and installed it

[@divine91177]

Hmm... not 2 sound like a total newbie.. but does this translate to lcd tvs? I'm thinking the internals must b fairly similar to a computer monitor but figured it never hurts to ask... u know, b4 i crack my 50in lcd tv open. 😃 Btw... just found your channel n totally addicted. Great stuff. Thnx.

[@evknucklehead]

I know this is replying to something posted over a year ago, but I figured I'd chime in anyway. The only real significant differences between TVs and Monitors are the extra circuits for handling audio and RF signals (if the TV has a tuner built-in). One other thing to consider is that most TVs and Monitors sold in the last few years have LED backlights instead of the Fluorescent backlights used in older LCDs, so you might not have any high voltage lines to disconnect when disassembling the display (does simplify the process a bit). Capacitors are still one of the most likely components to fail in these, though, so it would still be a good idea to replace them all.

[@coldspring22]

Yes lots of monitor issues are due to capacitors - but I wish there was a way to more defnitive diagnostics! ESR meter perhaps?

[@tomcat501976]

Hi, I wanted to ask if I could use a esr 47uh capacitor instead of a 44uh capacitor on a pc motherboard I'm working on. Both caps are 16 volt. Thanks for any input you can provide.

[@cv3nda367]

I have one monitor that one day turned white, so I checked cable but it seemed ok, didnt try other, and I changed few caps but no luck ... and another monitor just wont turn on completely, caps looks fina ... any idea what to do with the whitescreen monitor ?

[@jonaszprzybycien6545]

The fact that he mentions Fry's and Radio Shack make this video feel even older that it is xD

[@mickeyflowers]

They are both gone now.

[@Federico84]

why didn't you test the capacitors with a tester? that should reveal if a capacitor is damaged, am i wrong?

[@fimbles1015]

+Tecnovlog You cant test a capacitor while its still on the board. You need to desolder at least one lead anyway. While your removing the thing you may as well just replace it as they have a limited lifespan. Ebay is pretty cheap for caps if your buying in small amounts.

[@MeOnTech]

Adding an extra capacitor where it was not needed would change the Q of the circuit. You may be either doubling or halving the capacitance if the circuit. Surprised it worked.

[@addydiesel6627]

I'm only amateur and lve not read electronics for years. But i can remember increased capacitance is major problem in oscillator circuits, in which case it would halve the oscillating frequency. Otherwise if the capacitor is converting to dc then its not an issue. But in principle you are correct in that u either have double or half. Obviously that Power supply has good tolerance

[@napomania]

my old monitor Sony as became REALLY slow on the refresh. it's impossible to look for the mouse because it has no time to display that he try to refresh the new position. i can look at it only if i stop moving mouse. in your hopinion is a matter of faulty caps? thanks in advance to you and all your audience

[@markbrown2450]

Wow, that was really cool. Now I want to try my hand at fixing a monitor. Thanks.

[@MrPicaso72]

I love living so close to Mouser and Allied so will call is always the best option.

[@fingloidfing3337]

SO those capacitors you replaced are defective? i got the same problem and the caps are not bulged out.

[@tokeeptrackofrandomsubs5899]

+Fingloi Delos reyes Well a bit late now probably for your scenario, but there's a few things to know about capacitors: even if they visually appear fine they can be dead or on their way out already. For these type of powersupply ones that will run at a decent load I'd suggest to go for 105 degrees celcius rated ones, it's important because this will make them operate at high temperatures. Lower temp rated ones are likely to die quickly when they get nice and toasty. Otherwise his story about which cap type to pick was reasonably on point. As for diagnosing if your current capacitors are still good or not can be difficult with typical testgear also you can't do it properly while they are in circuit (on the board). A capacitor that'll show the right capacity on a regular multimeter may be bad already due to a too high ESR or other faults (equivalent series resistance, basically the same concept as internal resistance that batteries have). One very useful test to do is to measure the DC resistance or continuity of a capacitor, if the resistance isn't practically infinite then your cap is toast and has an internal short (an insulating layer is damaged). For proper testing you'd have to use something like an LCR meter (or a Wheatstone bridge if you're into traditional methods). Again you'd have to do it out of circuit for proper measurements, but I've had limited luck depending on the components around the capacitor by measuring in circuit. At least good enough usually to get an indication if it's good or bad.

[@sammorgan31]

Both Radio Shacks that were in nearby towns closed shop. There is no Fry's around here. I get a choice of mail order or nothing.

[@magaras]

I have a monitor that the screen shuts off if I turn the brightness up too high, then that is also a capacitor issue?

[@mitsostechtips9047]

My monitor is an old 15'' philips 150s3 white and when it is on hard use, games and other high resolution stuff, my monitor is starting to have wavy letters, and i need to have a fan from the back from the monitor to cool the main board, and the waving letters on the screen are coming again ok, i think that i need help David!!!