ULTIMATE LCD TV REPAIR SERVICE GUIDE for TROUBLESHOOTING BOARD VOLTAGES

[@TampaTec]

share this video to anyone it may interest and like the vid if it was informative, thanks for your support. fluke multimeter ..amzn.to/1I6yRPJ 20 dollar good auto range meter ..amzn.to/1T6AAec ISO-tip rechargeable soldering iron- amzn.to/1Z4CygA Butane soldering iron- amzn.to/1S3acEx Weller electric soldering station- amzn.to/1O9Ui5k *affiliate links

[@bad1103]

+Tampatec I need your help please. Please review the comments from Bruce D. Thanks

[@markcastleton9956]

Is there a way to check the amplifier chip to know if its bad ?

[@markcastleton9956]

Great video

[@winstonchurchill8300]

120 volts?! That is 100 volts too low. Normal is 220 volts. No wonder the TV is not working properly.

[@mandy61978]

Tampatec t

[@FritoBoy30]

Your videos have been super helpful, especially this one. I recently took a job as a repair tech for a local college fixing a wide array of things, one of which are tvs. I have no experience with diagnosing tvs. This has been a big help. Thanks.

[@alaster33]

Thank you tempatec , I have never fixed a TVs but I am inspired and empowered to the possibilities thanks to your freely given directions and advice , I love how clearly you explain and demonstrate ( spell it out ) for us newness, I recon I will have to listen many times for it to sink in but your fully explained videos leave no stones unturned ( hopefully lol)

[@IE.Production_s]

Thanks you @tampatech, this video really helped me fix my 65in RCA led TV. I thought I was the PCB since I kept getting weird reading when checking the stand by voltage but I turned out to be my multimeter. The main issue was the Main board, which this video really helped me diagnosing the issue.

[@michaelcandy6283]

Great info love the way you explain everything love from Ireland

[@ronowens1946]

Hi Tampatec, I think your tv help videos are a fantastic help especially to people that have knowledge of electronics but are not tv engineers, I have fixed many TV's with help from you and others on you tube, but I think one of the main problems is cracked screens, there don't seem to be anywhere in the uk supplies new screens and they are a hell of a price even second user, so many good TV's are scrapped because of this,, it hurts to pull apart a really nice tv and scrap it,, ron south wales uk

[@TampaTec]

if laptop and monitor screens under 32 inch which I did a video, but bigger screens is too costly for manufacturers maybe cause high risk of damage when shipping, that's my guess.

[@saywhat9158]

Since the screen is the most expensive part, those cracked screen TVs should be used explicitly for donor electronic parts so that easy and inexpensive repairs can be done on intact TVs. If selling the electronic boards to places like Electroparts for some salvage value or extra cash was made more popular, then their would be a lot less shortage of parts to fix good screens.

[@curtisjones9157]

Great videos. Got a tv that was my Dad's who passed away it quit. Bought new one two years ago when wife got cancer. She passed away a year ago. I dont normally try to mess with these TVs but these have the memory behind them. I'm tech savvy but needed these voltages and basic functions to see if I can Isolate . The newest TV is a Phillip's not even two years old no light. But I had some voltages, wasn't sure of what volts where. Thanks.

[@CurtisFaulkner]

Tampatec, Thanks for this video. I've done a little troubleshooting already on a dead LG, and I'm going to use this video to guide some more troubleshooting (although my TV is an LED, so there are fewer boards to deal with). Here's what I've done so far- The TV is an LG 32LB560B-UZ.BUSMLJM. The TV does not appear to power-on: no video, no power indicator or standby light -Verified power cord was connected to a good outlet and passing proper voltage -Looked at both boards, no puffy capacitors, no obvious burns -Ceramic fuses have continuity -Measured voltages on output of power board using chassis as ground (all readings taken without attempting to turn the TV on): Labelled 12v/12v - Actual Reading 11.7v Labelled 3.5v/3.5v - Actual Reading 3.4v Labelled 24v/24v - Actual Reading 25v Labelled PWR-ON/DRV-ON - did not take reading Initially, before taking power readings, I thought that surely this would be a power board issue, but those power readings look really close to me, although I don’t know the board tolerances. However, it seems strange to me that the 12v and 24v are constantly on, since I measured them without trying to turn the TV on. I would have thought that only the 3.5v would be constant. One thing your video has got me thinking about is stability. I'm going to go back and check the stability of those voltages.

[@TampaTec]

+Curtis Faulkner can be main board or power board but i would go for main board get at shopjimmy.com cause they take returns (restock fee maybe charged)

[@CurtisFaulkner]

Thanks. I appreciate the suggestion and will likely go ahead and get the main board right after Thanksgiving.

[@abbeyzondo]

Your videos are very informative. Thanks.

[@JinSataima]

I have been a lot of time to learn .... How a simply to check the voltage stage by stage thank you sir❤

[@BikerBloke600]

Great Video. Keep up the good work. Mick

[@josephantony5589]

Thank you Sir for the basic points of trouble shooting in general.

[@romaldothomas8653]

Thanks for another informative video

[@Str8Reckless63]

I wish I had more thumbs. Great video ✊

[@westfield90]

You are just so knowledgeable. Very impressed

[@jamalabdul5529]

Thanks for the video and it’s been helpful

[@DizzzyKipper]

Another for my TV repair playlist.Love your Vlogs. Thank you.

[@TampaTec]

+DizzzyKipper thanks

[@cotto887]

Great video: very well explained good job

[@TampaTec]

Thank you

[@stevenzanella9390]

Really enjoyed this video and realize it's older but I'm struggling with a LCD backlight issue and can't find any decent info. Your video was by far more informative than anything currently on line. Would love to get some advice if your still responding to comments. Have a Vizio VX 37l with standby voltage, backlight flashes then out. Tested all voltages on power board as good, bought new inverter board on eBay, same problem. Don't know where to go from here!

[@owennewman2506]

Your tutorials are Excellent. Thank you very much. Owen Newman

[@bolon8200]

Thanks for your videos especially this one ive been repairing tv sense ive seen your videos, thank you Tampatec

[@johntaylor2722]

Great video well explained

[@TampaTec]

Thank you

[@torrensc]

Love your videos. Have tried all in above excellent video. Fuse good, bridge rectifier good. Power board output Connector only has one place where there's voltage and it's 4.91V steady (standby light on, no display), no other voltages present whether tv on or off...replace power board? Thanks mucho!

[@spoildbrad1276]

superduper!!👍🏼😘

[@THOMMGB]

Hi Tampatec, I know this is an older video of yours, but the information on checking voltages is timeless. I was just given a Coby 39" LCD TV that is totally dead. It's from around 2013. I'm going to check the voltages, but I suspect that it's the power supply. Something you mentioned in this video at the 3:31 mark is if the bridge rectifier is shorted, then it will take out the ...... something. Did you say, "fuse"? I'm still learning, so knowing exactly what gets taken out would be helpful. By the way, the fuse on my power supply is good. Thanks a lot, Tom

[@davidpeiffer2096]

I like your videos. I've done some electronic repair in the USAF many years ago so diagnostics and repair is not foreign to me. What I would like to know is where can I find the normal voltage that I should see on the test points on my specific Samsung LCD TV?

[@TampaTec]

On power board should read 3.3v standby even if tv isn't on. Try here, www.smarttvmanuals.net/samsung/samsung-tv-repair-manual-schematics/

[@hermangilliam6682]

Hi,tampatecYour videos are very helpful, Thanks

[@dougdew5264]

This video was amazing THANK YOU. If you could ever show the samekind of thing when dealing with the tiny ribbon cables and testing the voltage that would be amazing. Cheers

[@kgsivaprasad2356]

Very good informations and tuitorials...

[@tedgoulais4003]

Thanks buddy very good video 5 stars

[@jamalabdul5529]

Keep up the good work

[@carlmitchell7182]

Heay my man Tampa tec, much respect, keep up the good work and the good vibes. lock down makes me get involved with trying to repair TV, I learn from you. but I am not very good at testing for fault. I find a dumped LG 50 inch plasma TV Model No PD P50R10 100. main stby light comes on steady, no caps looks swollen, but the green light comes on the tcon. board when I unplugged the main board connector from the power supply board, I lost the green light plus power on red light on the front, Help. much blessings and thanks

[@tommyp8920]

There is so much useful info in here it's crazy.

[@mampssingh1738]

your videos are very helpful thanx for uploading

[@tonyalale3808]

Thanks for this deep troubleshooting, I have 75' Vizio flat screen with three busted capacitor in the power board, I replaced the 3 capacitor but the TV will still not come on though the capacitors rating was 68uf 450 but I was able to get 47uf 450 to replace them but still not working no single light anywhere

[@SkyfallLodge]

Good explanation.

[@matt5622]

Thank you for the informative video. I have a Sony Bravia, just over 1 yr old that turns on, but then starts to power down and then back on, off, on, etc. Now at least I have somewhere to start.

[@espritsupply2769]

hi, tampatec. been watching your videos. and loving it. at 10:50 on this video, how did the lights come on. the lights were turned off so i am not sure what you did to have the light bulb turn on. it was magical for sure. induction? by the way, i've donated to programs that i thought was worth while, and there was an option which allowed me to do so. you should have the option for us to make a donation to you. i would love to support you for all the information that you provide.

[@tariqm1955]

very well explained and very helpful

[@THOMMGB]

Thanks for this very informative video. I've got to wonder if you've ever done a video on replacing a bad IR sensor on aTV? I'm not looking at replacing the sensor board, but the actual IR sensor. I'd like to learn what's involved with that repair. Thanks a lot, Tom

[@williamstayton7810]

This is Bill in Las Vegas You do good work I have learned a lot from you. Have you seen Alligators In Tampa?.

[@vincewolf5218]

Always enjoy your videos, really informative!

[@wilmarclouisjean8596]

what a nicest video, repair, I did not see it yet very interesting. Good job my friend

[@cradeal-comboardss-com6651]

Hi Nice to meet you we are a primary online tv part supplier,we have various kind of circuit board for tv and computer plz visit our webstore www.boardss.com www.boardss.co.uk Best Regards John Peng

[@redtag7326]

THANK YOU TAMPATEC !!!! I hope you make good money and live a blessed life because you are very smart and devote a lot of time sharing on KZbin I've learned a lot from you! I have a Panasonic 2013 LCD/TV model TC-L58E60 POWER SUPPLY TNP A5807 2 that was given to me it won't turn on and I'm a beginner with TV's and don't have a lot of money to put into it and I would rather repair whatever board is the problem if you get a free moment I would just like your advice on where to start with this model and if there is another brand closer to Panasonic that you already have a video I should watch? THANKS AGAIN !!!

[@ruwanrathnayaka7782]

Thanks❤

[@03126222078235003]

Thanks for sharing your worthwhile information. 🙏🙏🙏

[@williammccourt2979]

Great Video's I have a Toshiba 32" 32AV502U witch i have had for yrs. The trouble that i have now is i turn tv on the green light comes on it try's to come on and i start to see pic then it doesn't come on but the green light stay's on till i turn it off. If i cycle it several times maybe 6 times when the picture starts then it's fine and stay's on. I get the impression that when it starts it not getting enough Voltage to stay on like a clinoid in a car. I haven't yet taken apart yet but i will in the future. do you any video on a 32AV502U with the same problem? thanks Bill

[@errmaliabdulhamid2062]

fantastic explain pro thanks

[@grace2u776]

like your hat dude...are these available for sale? hey thanks for all you do,love your video's...keep it comin

[@TampaTec]

Get TV boards at shopjimmy.com or electropartsonline.com

[@badrlinux6786]

nice video man u help me too much to know a repaire some smps :) thank u again

[@TampaTec]

+badr linux thanks 8^)

[@gissel8163]

AWESOME SITE AND VIDEOS THANKS!

[@michaelstansfield2523]

Hi Tampatec you have answered a lot of my testing on board capacitors etc and the use of the mesr meter .Can you give us a type of meter to test thermocouples on air conditioning units and or one of your videos on testing newer inverter controlled boards on air conditioning units.This would be greatly appreciated

[@Dragao515]

Great video TampaTec thank u for this. I will be free to ask u for help. My Quadro tv make me problems. It have power and sound but no picture. When I use lamp I see something. I was open him and on power supply I found one bed capacitor after change it work perfectly but just two days. First day after turning off and stand on stand by for a few hours I need to start him two times and it work. But after second standing on stand by it's no way to turn on. Probably same capacitor again. Please can u tell me why capacitor dieing when is tv on stand by. Best regards from Montenegro.

[@jaileal8806]

thanks for sharing, subscribed.

[@tectalabyss]

Great tips and how to. Thank you.

[@JuanmaNatal]

Hi there, at 8:50 of the video you are checking the 12v going to the "Tcom board". I checked mine and it's reading .02 volts. I already replace the power supply, cause I think the problem its on the mainboard. Any suggestions? Any specifics to look on the MB? Any step by step? Thanks in advanced.

[@TampaTec]

Juanma Natal yes main board

[@JuanmaNatal]

Got any recomendation of what to be looking there? And in what order should I'll be looking? Thanks again.

[@TampaTec]

Juanma Natal I had 2 bad capacitors on main board but not sure if that is your issue. if you unplug tcon board and get 12v then bad tcon board is causing voltage drop. if it's still .02 then check caps trace it down.

[@JuanmaNatal]

Really apreciated, and thanks for your instant reply.

[@vernonbosshard9317]

Do you have any knowledge of those LCD LED tv repair guides online downloads, are they worth the money?

[@BongoSanta]

Hey Tampatec - great video! I have an LG 55LB5550-UY that has a black flashing screen. It passes the flashlight test so I know it has a picture. So far I have replaced the power supply board, T-Con board and Main board. I have also also replaced the LED backlight strips. It is still doing the same thing - flashing about once every second. At this point, I'm thinking that maybe the new power supply board I put in has a problem - what do you think? I'm running out of ideas.

[@armandobernal3846]

thank you for your videos amigo

[@thobekanikhoza4038]

thank you brother

[@madscience6283]

Looks like I found what I was looking for xDYou should add a link in other videos

[@missrebeccao.mcqueenthe1on332]

What do you suggest replacing a Vizio Smart TV 39 inch HDMI input

[@Smokinlucretia]

Excellent Video +TampaTec! Very Informative! I can now attempt diagnosing my LGTV besides replacing Caps :D Cheers M8!

[@TampaTec]

+Ayleid Ruin good luck, if you need help just ask 8^)

[@richardbrown6052]

Great explanations and demonstrations; trying to work on an LG374450 when it turns on gets image and sound - the indicator light goes from Red to Blue than after about15secs. lose everything and the Blue light turns to a blinking red. Testing the power board voltages pins going to audio - when it is on initially have (2) 20volt pins and (2) 3.5v pins and (3) 12v pins when the indicator light goes from blue to red blinking lose the 20volts and 12volts from those pins, been checking diodes but so far haven't found anything --- any suggestions

[@thetrue5503]

very helpful! Thanks a lot buddy.

[@bburk5938]

good information,appreciate it

[@fatfish3238]

Hi Tampatec , thanks for what you are doing for people.. I wanted to ask you if you would be able to help with my issue. I have Bauhn ATV-55 FHDED its led tv not older then 3 years. Iam I have a problems turn my TV on. It's always turn on I can see a logo and turns off and on again cycles. Sometimes starts to run. I check powerboard and replaced 4 caps which looked not normal. But no change. Still same problem . What I have noticed is that on SPON pin I have 4.4 V and Iam not sure if it's enough. Thank you for any idea

[@buckmajor]

Thanks! Liked & Subbed!

[@joeperoniiii4151]

Nice helpful video! I

[@RegentDevil2]

My relatively new LG 4k LED has a constant blueish tint/hue that can't be mitigated by any colour settings. Do you think I would need to replace the tcon board, the lvds cable or the entire LCD panel itself? Thank you.

[@allanthompson9695]

Great informative video.

[@erikneilsen6461]

thanks for the great vid. I have a Sony kdl-46ex500 lcd tv. it won't power on. no standby light. I am getting 3.3volts to the main board. does this mean that the main board is bad? does this completely rule out the tcon? thanks

[@gigglegigolor4944]

Good bro! What bout a dvr? Do you know also how to repair dvr? If possble can u do the same guidance as this. Very instructional and helpful. GL bro!

[@armenvegas]

You rock bro. Thanks

[@hectorvazcones817]

Hi dear friend I have a lg 32lh20r. Manufactured in 1999 . Apears lines on screen when I just turn it on then after 5 or 10 min goes away .. they told me it maybe the t-con board .. I been learning about my tv end it appearly doesn't have a T-con board individually placed . Do you thing my tvs t-con board was built tongether with main board ? Looking forward to hear from you

[@bobkreig7510]

i wish to inform readers about my experience in trying to repair a LCD Samsung 52" TV Some time ago my daughter gave me her TV set because it was completely dead . She wanted to throw it away and I strongly refused to do it. I promised to look at it and put again in operation. In spite of my age (88 years old) I started a research and I found this site. I have some experience in electronics because i am a licensed Radioamateur but without a particular experience in modern LCD TV. Of course the first thing i did was to look at the main power board.I changed all filter electrolytic capacitors apparently good but with a too low working voltage I substituted with 25 working voltage capacitors with a total expense of less then 10 $. The set was always dead except the stand by red light and the clicking of main switching relay. Audio was working but screen totally black. Then I started a very patient control of the various voltages present in all boards (main power board, logic board ,T Con board). I strictly followed the various suggestions of Tampatec how to proceed with my multimeter. All LCD were not lighted and i began to search some replacement board to recover this TV. The voltages were ok but no high voltage to drive the inverter board . Few days ago I was looking once more at the back side of the TV and I was bit desperate to find reason of the missing high voltage of the inverter. I was convinced that all was in order but no way. Black screen persisted. Then suddenly I had a very simple idea. A very banal reasoning. The voltages are ok but may be in some connector the electric contact were bad mainly for oxidation or for other mechanical reason. Then i started to disconnect all connectors of each board and with the special liquid for increasing conductivity i sprayed either the male and female connectors putting then again in proper position (feeling with fingers the small click when properly inserted. ) Et Voila Everything started all worked fine . Great satisfaction! I kept the TV on for many hours and days switching on and off just to be sure of my work. Hope that this experience could help others readers

[@gofer123guy]

Is there a way to get a reference to where each board is located in the event taking the back cover off only reveals the one board?

[@TechnicalGFX]

Hi TampaTec. Thanks for putting up all these tv repair videos. Been trying to learn from them hoping I can fix this Sceptre tv that I have. I have a question. My TV is intermittently turning on. Actually there are weird things going on with it. The standy light comes on if I let the TV rest for a few hours. As soon as the standby light is ON the TV can be turned ON. The red light turns blue and there's picture on the screen with no problem. But after like a minute or so the TV just shuts down completely. No power and no standby light. You can't turn it back ON. What I do is I unplug it and wait for like an hour or so, plug it back in then the whole thing happens again. There's even times that the standby light doesn't come back at all till the next day. I am hoping you can share some of your expertise on this.

[@joeventure2450]

Help! I have a Sharp Liquid Crystal TV model LC-70LE550U the other day the picture froze and then went dark around the edges then slowly would fade out all but the bottom middle... then finally that would fade out as well. I would turn the unit off then on again and it would be good again but within moments do the same thing. Is this the T con board? If so... best place to purchase another?

[@eddiemays2948]

Hey :-). Love your vids! My question is, what to look at if the Bridge Rectifier INPUT doesn't read the proper voltages. The tv I'm currently working on is only getting 20v at the input :-/

[@H.W.H.alshammari]

Great . Thanks

[@mortlock59]

We have a Proscan LCD 42LA45H with sound but no picture. No image showing doing the flash light test. The upper four wire connection from the power board to Main board should be 28, 28, 4.9, 4.9 volts, I read 14.92, 14.92, 4.9, 4.9 volts is this the problem? Also would like more help on testing the T-Con on this unit please. Your videos are a great help, thanks.

[@saywhat9158]

This video was very helpful and informative. Thanks.

[@johncarrjr2499]

Thanks for your informative videos. I am replacing the main board logic SMP chip. This chip has a metal backing that I think may be a heat sink made onto the bottom of the chip. This chip does not come off easy without damaging other it and the SMP’s that’s around it. I am using a rework station and this chip acts as if it is (heat sink on the bottom of the chip) soldered. Any help would be appreciated. Thanks in advance

[@roramisrael]

Been following/subbed for some time and hoped I would never have to contact you. I have an intermittent screen problem with a Sharp model LC-C4677UN. Would you recommend that I replace the t con board?

[@00Skyfox]

I've been trying to fix a Vizio E220MV 22" LCD TV that has an external power supply. The problem is no backlight and no picture (blank screen with the flashlight test), and of course without being able to know what it's doing I can't test sound. It powers up and the invisible touch buttons respond by lighting up but I have no idea if it's actually doing anything. All the voltages check out fine and all the electrolytic caps look good. Any ideas of what to look at more closely?

[@GeigerCounterVirtualMuseum]

New sub. here. Good vid. I learned some things,thanks.

[@taharsahouli2951]

thanks for this video.

[@mikefixescars]

hey I'm in Tampa. i have a 50" onn tv led. no picture but i have sound and backlight. saw a burnt processor on tcon board and replaced the tcon board. still no picture. what else could be wrong? i would like to test circuit and cable but connections are so close together

[@ricksharp6597]

I'm getting basically 2.5 v DC out of my 1st led pin and 40v DC out of the rest does that sound right? And about 3v out of my detection pin

[@aundreis]

I have no input signal on all HDMI inputs or av inputs. The power and main board are integrated into 1. Sometimes shuts off when trying HDMI inputs and red power led blinks 3 times. Would this be the main board or to con board?

[@francabergey7376]

Hi, great video, my vizio is cloudy...could this be ribbon cable to panel? thank you.

[@vitro21]

Hi Tampatec, I have a Vizio D58U-D3 and it works except the left and right halves of the tv are different colors so it appears that there is a line right down the center of the tv. I already replaced t-con board, what else could it be?

[@williammendoza6251]

Hey Tampatec. I have an element TV that the standby light is on (red), but tv wont turn on and if it decides to turn on by a miracle the stand by changes to blue, but the screen does not turn on. I checked the power board and one of the outputs that was suppose to be putting out 24v was putting our 23v. I bought a new power board, but still having the same issue. Any suggestions on the next step?

[@pmarshall3130]

Is it normal to get a small shock from the chassis I received one through my thumb

[@Electricworld-1]

very good

[@EdABrass]

Hello Tampatec. I was wondering if you can give me some suggestions on what I can do next for a TV I am trying to fix. It is an RCA 22" LCD Full HDTV. The problem is crackling sound. There is one board that handles both the audio and video (video has no problems). So far, my thought has been to replace the board. But so far, I have not been able to find a replacement (tried the links to parts from your vids and they don't carry the board-and tried other places and was told it is not made anymore. I haven't even been able to find a circuit schematic for it. Any suggestions would be appreciated. Thanks.

[@cyo_corner]

Checkout the capacitors and inspect them. Do you have an ESR meter?

[@EdABrass]

@@cyo_corner sadly, i do not

[@mahmudsaid3158]

Wonderful

[@smattawaritoma4861]

Sir, good job. Pls, how can I become your student on screen repairs. Smatt Awaritoma.

[@rinusborg]

Hi. I installed new LED strips in my LG54M0060V12. The older strips needed replacing and when disassembling many of the lenses fell right off. I heard that was a common problem for some LG screens. Very easy to do actually but the light on the screen now shows the pattern of the LEDs. The sreen and diffusers were put in correctly. Is this another " learning curve " thing to worry about?

[@rinusborg]

I mean all of the backlights, not just a few. Looks like wrong lenses on the strips.