LCD TFT monitor fix, black screen, no display

A guide how to repair a non working LCD TFT monitor which only displays a black screen. Recap the electronics and get back a working monitor.

[rainerheller]

Der Monitor, den meine Tochter kostenlos beim Kauf ihres Computers dazubekam, ging kaputt. Die Symptome waren dieselben wie von Ihnen behobenen, die Kapazitoren sind ausgewechselt, der Monitor laeuft wieder. Vielen Dank aus Amerika. Sachen nicht gleich in den Muell schmeissen zu muessen, ist awesome.

[BranchingBooks]

Thank you! I've fixed my monitor due to your video.

[vecomm]

thats correct Sam, you can go higher voltage but not change the capacitance. They choose that value for a reason.

[ZeEngix]

if you reading this on 2017 if u left your pc open for long time then ur pc auto go to sleep mode for 5+ hours then when you go back it doesent display well all u need it's to unplug your pc for an hour then plugged it back and on the pc and it will works normally .works for me

[romaneberle]

it works! thanks! i have a little bit of hobby electronics experience, and I wasn't expecting it to be the caps, but thanks to your video this was quite an easy fix. :-) device was a Grundig DAVIO 20 inch LCD tv, symptoms were: sometimes black screen on power up, then quick black flicker darkening screen and making it unwatchable (which would stabilize when left on for some time), then always black screen. now it's proper blue again. :-)

[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 ???

[skuzziYT]

I'm pretty sure you can't just change out a 2200uf cap with a 4700uf. The voltage doesn't matter as long as the replacement is equal or higher. Correct me if I'm wrong though.

[SkyFrost]

My brother is an idiot he tried to fix the monitor,
He cant fix it so he started slapping and punching the back of the monitor
Then it stopped working....

[tuhlteim]

It's pretty hard to find a matching tube and they're not cheap. It would be worth the effort if you would have a second, broken monitor as spare parts source.

[xwir]

my monitor was working fine, i turned it off and when i went to turn it back on, no red light (Power off signal) and when i press the power button nothing happens help plz

[BrotherOfMetal]

Hey Tuhl Teim,

I have the exact same Hanns.G monitor, however I'm having a completely different problem. The monitor turns on just fine, however the screen is completely WHITE. I suspect that it *might* be the backlight of LCD -- the problem began with the screen becoming lighter and lighter, as though the brightness had been turned p when in fact I did not change the brightness setting. It used to be that when I left the monitor off without the power cable for a period of time, the monitor would function just fine. Then I ended up having to do that more and more. At that point the monitor would turn on, display just fine for a second or two, then immediately get brighter and brighter, THEN go completely white. Now when the monitor turns on, it just immediately gives me a white screen.

I would GREATLY appreciate your expertise on this issue. Please respond as soon as you can!

[DNAChallenge]

Hanns-G HH221 No video after replacing 7 Capacitors
Let me begin by saying that recently this Hanns-G computer monitor started experiencing only staying on for like 2 seconds, there was video and audio from HDMI, there was a slight zap like sound from the back but no other issue, after checking around I learned this is a fairly common problem with bad capacitors, I examined them and found none to appear bulging or burned but seeing how this was the least costly repair I decided to replace the ones that are recommended replacing. So I just replaced 7 capacitors as recommended by the seller I bought them from on ebay, I made sure they were installed properly with the negative side, short lead correctly, made sure no solder overlapped to short anything on the circuit. I put back the CCFL and re-attached the Power board to the video display board, turned it on and now The green light shows there is a signal it stays on when the HDMI cable is removed the light turns yellow like it should, Windows shows the monitor is connected, audio is working through HDMI the zapping sound is gone, but there is no video whatsoever, I mean I shine a flashlight on the LCD and I can't see anything so that kind of rules out the backlight. I also tested it with VGA and same thing no video. I can't figure out what went wrong, I have checked and double checked the Video board cable, the CCFL connectors and nothing, the only thing I can figure is that that it's either the LCD or inverter is now gone and if that's the case I'm done as it's just gonna get too costly to fix. If anyone has any idea what's going on here and what might be the cause please help. Thanks

[christopherpham]

My case is the same as yours but I cannot lift it up like yours does. How did you get the back case loose after removing the four screws and stand? Thank you

[doogleaelf]

you need to match the capacitance. It affects the smoothness of the DC and is used in conjunction with the inductors to smooth the pulsating dc to a relatively flat line dc

[xombiefn]

Hey. My monitor is “turning on” i can see the led indicator on the power button. My computer detects it, but no display or picture. Any help or solutions on how to fix it?

[burbol]

But is this monitor otherwise ok. The power light show its going on? or is it completely dead??

[JinriCelestine_Vlog]

How if the screen open but a sec.. its turns to black screen??

[techsport]

I wanted to ask. If my monitor have good working ac/dc adapter which is seperated from monitor. What are the other factor that causes the monitor still have blank screen/black screen after connected to the supply?thanks

[davidjovanovic]

Bro my screan goes black every time when i let a window down
Heelp

[wordreet]

Excellent work man!?!! My current LG monitor shows a black screen for 60 mins or so before I can use my PC !!! Can I test the capacitors with my dvm?