CRT TV Repair #6: Doesn't power up

[@cvbabc]

Your English is very good. Don't worry if you didn't use the exact right word when you edit it later. A wrong word here and there makes you memorable and interesting to listen to.

[@mohammadzare9927]

😥 i wish you could survive from psychotic putins bombs and shamefully Iranians drones😥 iran and government is not same.

[@DD-jk3nf]

Very interesting watch as I have a CRT I'm going to tackle repairing and I know nothing about them xD Thanks for the video, dude!

[@frankreiserm.s.8039]

You're smart; smarter than me with your HOT BJT solution. You can build an ELINCO cross hatch, color bar generator to inject a signal into the tuner. Thanks. Frank

[@saarike]

You are an expert. Nice to watch those complex CRT's repaired!

[@mrjohhhnnnyyy5797]

+saarike Thanks :) I can't consider myself as an expert, I'm just a hobbyist who likes to repair such TV's. Most problems with them are nothing but ridiculous, but sometimes they can turn into a rabbit hole to hell :D

[@saarike]

I agree that things can go very difficult to solve. Still I consider that it is very difficult to find such problems as you did :). Nice that you have made CRT videos. There is not so much videos about those marvelous devices and it's technics. Thanks!MrJohhhnnnyyy

[@mrjohhhnnnyyy5797]

saarike I have some footage of me repairing old USSR made TV, over 30 minutes in a bazillion of short clips which I have to edit together :) I'll upload it on next Monday, since right know I don't have access to speedy Internet connection. Now I make a video of every CRT TV that I get to repair, but unfortunately, they don't come to me very often, thus I can't upload vids regularly.

[@saarike]

+MrJohhhnnnyyy I'll wait it with enthusiasm! Thanks in advance!

[@mungelectronics7601]

You guide the repair work really well

[@nigelwilliams4800]

Be very careful with High voltage you only get one chance...

[@WinrichNaujoks]

I would say that a repair taking three evenings and altering the circuit IS a difficult repair!

[@user-hq2fy5cs1k]

*_Благодаря много за видеата ти , Помогнали са ми много_*

[@csabasanta5696]

Great video, thanks for the upload

[@pvhitv7788]

It's a helpful video thanks for sharing..

[@billwilliams6338]

MRJOHNNY, The TV monitors B+ voltage is controlling what? Is the B+ voltage a bias voltage DC offset voltage for the sync and hold circuit?

[@bertobalingit9484]

What type of soldering led did you use? 60/40?

[@aabb-zz9uw]

Hello. One of my CRT TVs once worked then suddenly the following happened: When I press the power button, the TV only emits a high pitch sound and screen doesn't display anything. The CRT itself showed no symptoms of wear or failure before that despite over 25 years of use. Could it be the failure of capacitors,either on the power supply or at the FBT side? I can't find anybody who would do the repair and can't buy a new one due to space constraints.Thus I will have to do the repair myself. Thanks.

[@mrjohhhnnnyyy5797]

It usually does that when the Horizontal Output Transistor is shorted. Make sure the TV is unplugged and has been for an hour or so, for the capacitors to discharge

[@slycooper1001]

i have a monitor with the same issue i however don't know where to find the service manual for my monitor's model usually would tell you what to look out for. ie parts and such.

[@Raz82000]

I know I'm late but besides shorted Horizontal Out Transistor, it could faulty jungle ic. 90's toshiba crts are known to do that because sync separator are not inside the jungle ic thus the horizontal section keep oscillating.

[@live2digmetal]

Thanks for the video. I'm curious as to how you can measure ESR on a normal analogue multimeter? I thought special ESR meter is required for this? Best wishes.

[@mrjohhhnnnyyy5797]

+live2digmetal No, that's not an ordinary multimeter (if you look carefully, you'll see an absence of range switch). I made a little circuit that can measure ESR and it requires 50uA movement, so I bought this cheap meter and gutted it out. Very good candidate - you have a case, a movement and jacks to connect test leads for 2$, score :D Schematic: ludens.cl/Electron/esr/esr.html

[@mitropoulosilias]

interesting!! Please can you speak louder next time?? Nice job!!

[@mrjohhhnnnyyy5797]

+mitropoulosilias Thanks! It was around 1 AM, so I didn't want to make much noise. I will boost the audio while editing the next vids, thanks for your feedback.

[@kurimtarmin1903]

[@Ramp10er]

Suggestion! Create a subtitle in your tutorials, even if you don't speak english well, or garbled your language and to help others with hearing impaired...

[@FloppyDiskMaster]

It's called ASMR and it's art!

[@patrickbruneau1057]

I have this early 80s zenith tv and I have this wave going bottom to top any ideas what might be wrong ?

[@t0nito]

20:30 Admit it, you shit your pants there! LOL

[@mrjohhhnnnyyy5797]

+t0nito Not really, just got me by a surprise :) But I almost did just that today when TRIAC blew up in front of me LOL

[@t0nito]

+MrJohhhnnnyyy Life's full of surprises :P hehe

[@mrjohhhnnnyyy5797]

t0nito Can't disagree on that =)

[@poltubora5797]

Ohh u r too gud nd ur voice soo prety love uu my friend

[@snuggy1985]

My crt tv was working fine then suddenly I lost sound and the screen went to static. What could cause this... Thank you

[@shoyaibpatel108]

hi please elaborate explain to me what can we do hear.as i mentioned earliar the L3 terminal is chipped of.thank you shoyaib

[@mrjohhhnnnyyy5797]

+Shoyaib Patel You didn't send me any pictures yet. I gave you my e-mail in reply to your previous post. Give me some pictures, a picture's worth a thousand words.

[@ravivaishnav9248]

please tell me how to join wires of on board menu buttons of CRT tv. I have a CRT tv, it was bitten by rats. First I tried to repair it. I succeeded and it repaired but after some days it damaged. now I forgot how to join wires of button plate.I have no remote. I want to on tv without remote. Please reply fast.

[@mrjohhhnnnyyy5797]

Sorry, but I really can't tell, all TV's are different. Try to get the idea how they're connected from the remaining chunks of wire.

[@generslabofwelectronichobb7649]

LOL 1nf resistor from were you get that

[@schwarzbildvideos4971]

Same problem with my tv..., but mine doesn't make any noise at all... I hope i can fixe mine...

[@ovurubrian9945]

Yooo finally found an English version

[@shiineyturbila4897]

sharp tv the problem is power after power is on the tv back toshut off 1 minutes power is on

[@jansander2231]

hello gudeve.I have an crt tv.standby light is coming but when I press the power button nothings happen..I check the button switch it is good...

[@mrjohhhnnnyyy5797]

+Jansander Augusto Try pushing CH+ or CH- button when the TV is in standby mode, most TV's turn on from standby by doing that. If it doesn't you'll have to investigate further.

[@jansander2231]

problem solve...open resistor...thanks...and if i need your help...pls help me okie??

[@mrjohhhnnnyyy5797]

+Jansander Augusto Well, you know, TV's are DIFFERENT. I can't just go and point you at the problematic part without having the schematic. More of it, there are many parts that can fail and cause same trouble. If you want me to really help you, at least tell me the model of the TV. I'm not a magician.

[@jansander2231]

thank you verymuch...i allready fix my tv....more power god bless

[@sanjitmishra6432]

sansui color TV stars after few minutes automatic power off again and again why?

[@cerollymacabulos3178]

How to 21 inches crt tv black picture but good sound?

[@shoyaibpatel108]

Hi. need help finding inverter board for sharp 66DS-O5H crt t.v. The number on the board is F7216BMN2 A.please can you help me locate this board to purchase as i am unable to locate this.thank you shoyaib

[@mrjohhhnnnyyy5797]

+Shoyaib Patel Unfortunately, I can't tell where you can get the boards. Did you mean power supply board or what? I looked up the schematic for your TV and PS is not terribly complicated, maybe you'll be able to fix it. What's wrong with it?

[@shelby50411]

what about crt no pwr on no standby light no clicks...its a 2002yr toshiba crt....main fuse on ps is ok.

[@99hari55]

Usual Horizontal short

[@muuseismailawjaama2880]

thanks brather

[@bkjivatman7418]

What is cost of repair

[@floridagliderpilot4101]

Confused, you keep calling ohms millivolts

[@mrjohhhnnnyyy5797]

Because in the diode test mode, the DMM shows a reading in MILLIVOLTS. Why would you test it in ohmmeter mode?

[@shoyaibpatel108]

hi its the small board located on the tueb with the two tueb pins stiaking out from the board.the L3 terminal on the corner of this curcuit board is chipped of.ther is no way i can connect the red wayer in the terminal.the L3 terminal on the scematic is referanced as G2.please can you give me your email addresh so i can send some photos.thank you shoyaib.

[@mrjohhhnnnyyy5797]

+Shoyaib Patel mrjohhhnnnyyy-at-yahoo.com Replace "-at-" with a proper symbol, I've done so to prevent spambots flooding the inbox. Most of the time we call that board "neckboard", the red wire you're talking about comes from flyback transformer and goes to G2, am I right? If yes, that's so called screen voltage, it's pretty high, so be careful not to zap yourself.

[@DILEEPKUMAR-sf1hz]

IGO CO../ CLICK SOUNDING/ BUT NOT POWERUP/SOLUTION PLEASE

[@shelby50411]

What about crt click click no power power

[@do84alfie]

my god this is my tv promblem now

[@vijaykelakar9567]

Power Supply voltage testing

[@criscahatol2391]

my tv have red screen ho do i fixed it !!

[@3butalcomp3]

You didn't mention age/make of set... or if it's a crt or flat screen! BUT it may be cold solder in/ around your video processor, or the video processor chip itself, a bad cap/ xstr in same circuit, check your connectors as well bot on PC Bd. Check Connector(s) on back of CRT or to Display. CRT set? Check driver xstrs on PC bd, on rear of CRT. If all is good, check CRT or your display. It's sort of hard to real give you a narrow checklist as you didn't mention anything about your set, other than a red pic. You should try tapping your main pc bd lightly with the handle of a screwdriver... you may be surprised.good luck.

[@3butalcomp3]

I don't know how experienced you are in TV Repair, I really meant to start with this, sorry: >>Before doing any work on your set -while it's off- make sure to discharge your CRT (if you have one), and the areas in your power supply that are relatively high in voltage..Your CRT is capable of shocking the hell out of you for months since the set has even been powered up. *** If the TV is on, and you accidentally come in contact with the High Voltage with ONE hand, the other hand away- completely isolated and behind your back... you will be thrown a few feet, and you should go to the hospital & get checked out. If your other hand also was in contact with the set you will be unable to let go & more than likely be killed. -Be very careful

[@chetan91203]

sir in my tv pictucre come and in few second it gone and its gone again why this happening can u tell me plz or can u give me yours email id so i can send you the video of my tv problem

[@venkateswarlutatikondala1670]

No volume

[@techjawad2700]

good

[@dipaknichit6914]

6654str बारे में अधिक जानकारी

[@rajesharuri2473]

Sir Telugu language lo chepandi please ...sir....requested...sir........

[@MichaelBeeny]

Your video would be more watchable if you used a tripod.

[@mrjohhhnnnyyy5797]

I agree, but first of all, I use the phone to film the video, and getting a tripod for it is tricky. Second thing is that I have to move a camera a lot to show how the TV behaves, then show how the board looks like. Some of my videos where the device under repair fits easily on the bench are almost shake-free because I use a so-called third hand to hold the phone still :) Point taken, I will try to film with the camera fixed. Thanks for watching!

[@prentrece222laster7]

I got a Zenith tv.

[@TechMan-yk7gr]

do you?

[@909sickle]

@@TechMan-yk7gr What kind of TV does he have?

[@TechMan-yk7gr]

@@909sickle i don't know but he spammed that he has a zenith tv so i responded

[@muhammadsaeedkhan1930]

bad quality sound

[@rahulrahulmondal9492]

Rahul Mondal

[@johngathright7179]

Vizio no power

[@jonykhan4410]

hi this me very nice

[@prentrece222laster7]

I got a Zenith tv

[@TechMan-yk7gr]

do you?

[@jeremy-du-7648]

Vestel

[@listernoble3613]

more learning from you dir thanks but I can't understand you ...plz translate to english sir .. thank you;))

[@TheGeoffers08]

Lister Noble Think it must be your ears. I can understand him perfectly well. Maybe post your vid when you walk through cleaning your ears out (soooo rude) 😀

[@shoyaibpatel108]

Hi sorry i have forwarded the photos via email.please take a look.thank you shoyaib

[@mukeshlahari4447]

mukrsh lahari

[@kastooraramgenwa1766]

candecher valua

[@tshepomatseke6227]

😂😂

[@gameselectronics2560]

You still have a analog programs in Ukraine ? lol

[@mrjohhhnnnyyy5797]

Andrewz! Electronics & More I don't see something very funny here, yes we do. The coverage is pretty bad since most channels switched to digital.

[@gameselectronics2560]

Yes i know i wasnt laughing really i just added the "lol" to the comment

[@ganeshganesh2628]

Video is not good

[@chrismichael3981]

no offense, but the TVs that you are fixing are very old and outdated, doesnt Russia have the new big flat screen TV? Im from Canada, and flat screen TVs are affordable for most people.

[@mrjohhhnnnyyy5797]

Chris Michael First, I'm from Ukraine, not Russia. Second, yes people here have LCD's and what not. But I live in rural area, so not everybody has new TV's here. This TV's may be outdated, but they are easier and cheaper to fix.

[@SeverMican]

Ha! I've got 2 HD LCDs at home and I have to tell you that my old color TV has a better image and color than any HD TV I've seen so far. Also, here in Europe, people don't like the north american style of "it broke, I'll buy a new one" mentality.

[@LonesomeToast]

what's wrong with repairing and maintaining instead of just destroying something repairable

[@prentrece222laster7]

I got a Zenith tv.

[@TechMan-yk7gr]

do you?