LCD TFT monitor fix, black screen, no display
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- čas přidán 20. 11. 2014
- 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.
On my German CZcams channel ► / @tuhlteimde you'll find another 320+ IT videos about Windows 10, 7, 8.1, hard drive cloning, printer repair, mobile phone tutorials etc. Lots of these videos have English captions. - Věda a technologie
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.
Thank you! I've fixed my monitor due to your video.
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....
Same
To me my sister just screams and slammed the tv on the floor. It really pissed me off cuz no tv for 2 weeks 😤🖕
Don't blame him, cuz sometimes it does works.
thats correct Sam, you can go higher voltage but not change the capacitance. They choose that value for a reason.
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. :-)
@Anton Cabais hi! no, i dont think there's a logo, the monitor's idle screen is just plain blue color. (I dont have it running right now.) I dont remember if my monitor was only black (=screen on, but "color" black), or "blacker-than-black" (=screen off, pixels zero brightness, like no power) before the repair. So I guess I wont be much help...?
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!
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 ???
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
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
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
same.
Same issue to me. I dismentaled the monitor and then remove the ribbon between LCD circuit fixed to screen from power circuit. The the power available bulb on. But when connect the ribbon back, again the power available light off..
Hi guys, have you fix your issues?
Does anyone know if I can use the CCFL of a Compaq CQ56 on an HP G60? Are they interchangeable?
How did you get the stand off because mine's is bolted from under
Bro my screan goes black every time when i let a window down
Heelp
i had a sony sdm-hs95 monitor (tft lcd) for about 3 years and it was working
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
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?
Tnx, very helpful to me..
But is this monitor otherwise ok. The power light show its going on? or is it completely dead??
Hi there thank you very much for your video. It inspired my to try fix an old monitor. The monitor has a very weak signal about 5%, its almost black. Its a Samsung Syncmaster 244t. Do you think that's the same issue?
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.
+Tuhl T I'm afraid to touch the monitor :((((((
obviously you have to solder. Its not lego.
ESS It was made ENTIRELY CLEAR when you saw that they were attached to the brown/mustard pcb. A dumb ass question deserves a smart ass answer. Let me guess, you're American right?
Anything with capacitors will require soldering do not attempt if you are just gonna tape it on.
What a snowflake, if someone gave an answer just move on arguing about it is waste of time
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
I always thought the capacitance can be higher (as voltage)... 🤔
I mean won't the capacitor be charged only to that capacitance (which is pre-determined by other components before that) ? 🤔
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.
+Sam Buckler i would tend to agree with you on this one same , it is possible that the guy just hasnt given a good explenation but you can use a cap of hte same or higher voltage rating should never replace it with one of a lower voltage rating but you should also never replace it with a capacitor of a differant farrad rating unless you are 100000000% sure that the capacitor is only used for smoothing purposes as the farrad rating of a capacitor plays a BIG role in the calculations done in an RLC circuit , So please guys if you try this the voltage should be the same or higher but USE THE SAME FARRAD rating as what you took off the board . Also the capacitor this guy used as an example of a blown capacitor is actualy from a computor motherboard , not one he removed from the screen .
+cameron hansen Basically it's the best to replace a capacitor with another one with the same rating, voltage and farrad rating. In my case, I repaired lots of monitors with capacitors of the same voltage (or higher) and the same farrad rating (or higher). These repaired monitors still work after years properly.
When a monitor breaks down due to bad capacitors the question is, whether these bad capacitors were too small-dimensioned. But despite this speculation it's definitely safer to replace a bad capacitor by an identical one.
I agree with Sam. I would NEVER replace a 2200uF cap with a 4700uF. I always use the same capacity and a higher voltage rating. When you use 4700uF, you mutate the circuit and that might be not safe.
very underrated.
great video. thx a lot for upload.
Oh great. I have to do THIS now 😱
How if the screen open but a sec.. its turns to black screen??
Ricardo Derudar maybe a broken cold cathode tube
I have the exact same problem. I'm hoping it's a defective capacitor or two on the display board and not the cold cathode tube. My problem right now is the back of my monitor doesn't come off nice and easy as the monitor he is taking apart.
On my German CZcams channel ► czcams.com/channels/CXFKQimXJEC-E2evTDwT9g.html you'll find another 230+ IT videos about Windows 10, 7, 8.1, hard drive cloning, printer repair, mobile phone tutorials etc. Lots of these videos have English captions.
My computer monitor i ball i trun in on the screen is black what do i do hlep me!!
Question: I'm running duel monitor system and my second screen just went black...on reboot it loads and goes in and then I see the display for about two seconds and it goes black again...if I hit the buttons on the monitor sometimes I get a flash of the display desktop and it goes back black.
I have taken it apart and replaced all the Capacitors on the Powersupply with the exception of the Large one.
Same problem no change......Any suggestions?????????
Hi Stormhammer, maybe your bulbs (ccfls) are broken. If your monitor has no LED illumination, it has (at least) two ccfls. (en.wikipedia.org/wiki/Cold_cathode) If one or more are physically broken, the logic board discovers this failure and turns off the power of the tubes. Replacing the caps doesn't help here. You have to replace the ccfls. Usually this doesn't pay off.
Please help me i have a problem my samsung LA22C350D1 cant detect HDMI but instead DVI detected. I am using HDMI to my video card/graphics card HDMI and my resolution is only 1024x768 and 800x600. In my Nvidia settings Digital Display was reading instead of HDMI to HDTV. What can I do? Sorry for my bad english! Thank you in advance and God bless!
i turn my monitor it will display for a 3 seconds then turn off, if i turn on it again it will turn on but it turn off again? do you think capacitor is the problem of my monitor? please need answer before i dissassemble it :) hehe
Lol my PC doesn't appears I mean monitor screen is black,but when i remove the graphics card works!.how can i fix it?!.
Thanks For Help
Thanks alot but for me its showed that it's 0,54w or how. But still i'm happy that i didn't have to spend money on new monitor. THANKS!!
My old HANNS G comes on when I boot up with a dimmed screen, then black out after a while, I wonder if its the same problem
Dave Douglas Maybe - but rather a CRT is broken inside of your monitor. When you turn it on, the electronics powers up the CRTs. If a CRT is broken, the electric current gets too high and the control electronics turns it off for safety reasons. So your screen turns black.
What Hz is that please
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?
same problem bro idk what to do
sir can i ask ? my screen monitor don't have display , when i on the monitor it stays on in 3sec then off but monitor was on "Green light=On" i already open my monitor's back but there's is no damage capacitor on it , is there another cause of it?
The same here, did you already fix it if yes how?
it has a display, but after a few minutes of working, it will off, led signs still on, only the display turns off. I had to turned it off and then on, it keeps repeating
I have a Hitachi tv 49 inch and my tv fades to black and I can still hear things but can't see anything please reply to me :""(
Christopher O Connell i have the sAme problem ..... 😢😢
Same😭😭
I have the same problem, what was your solution?
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
just buy a new monitor
Tq man
Appriciated it
Samsung only have smd capacitor i removed it bcz of short now black display plz help me
Do you have any other suggestions?
I've replaced the capacitors, still nothing.
The power LED lights up, but the screen remains black.
+xikes xikies same thing happened to me, have you tried putting the hdmi cable in a different slot?
+xikes xikies Maybe you've a broken backlight. Either the LEDs or CCFLs are broken or the LED/CCFL driver board.
+Tuhl Teim Thanks for the ideas! I have CCFL backlight. Would it be worth it to replace the backlight or try to fix the driver board?
I spilled some wine on my monitor at a party and it doesnt show anything on screen now , only the led is blinking...can it be fixed ?
I thought going up in capacitance was a no no, but going up in voltage was fine for changing capacitors?
I always thought you could go up in both. 😕
I have in windows 10 put its not that thing on you its wire
Please how can i contact you
Hi Mate, Can u help me? I have a problem with my 7 years old LG 2360V-PN external PSU monitor. Its give me the picture, but looks so purple. prohardver.hu/dl/upc/2017-06/299177_20170614_204001.thumb.jpg
The cable is good, the vga is good. Make it only at the Summer time. Last year has begin, but at the Spring turn good again. What do you thin, where must is begin?
Where can I buy the capacitors for my monitor ?
MJ Sanchez radio shack
You can find them up your ass & to the left.
@@dontblameme6328 this comment was left 3 years ago...
You can buy them at Mouser(www.mouser.com) or Digikey(www.digikey.com). Make sure to replace them with the same or higher temperature rating.
My samsung lcd displays for 2~ seconds and goes black or dim. What would it be?? Kindly help
probably the capacitors.
I have a problem with my monitor, are you tech?
My monitor is not working when i plug it and push the button it wont open
me too...i dont know how to fix it
No this is incorrect uF must match but volts can be higher value, not the other way round
So basically you just change the capacitors?
So it is!
Tuhl Teim so im right :D?????
Yes
Tuhl Teim :D😁😁😁😁😁😁
my monitor has problem first time lines and next monitor is black
Like mine.
Did u find a solution for it?
If that's the way, it is more practical to buy a new one.
Kenshin Himura some people don’t have the money and obviously have way more skill than you. For us this is way more worth it especially if you can get a broken one from a friend
Bhai mai bareilly se hu aur mai computer cours kr raha hu.
mai new desktop lena chahta hu.
aap batao mai kon sa lu bhai.
please help me
Bruh i cant even open my monitor
same
Same here☹️
This video upload ago when I was 2 years old
Indian tech support?
I got soo scared when I saw this on my pc
Just replace the firmware on my monitor. Works fine.
How do you do that?
The main fix is replacing the capacitors but you don't show us how to replace the capacitors ?!?
What must we do you? Search for another video?
Well you do need to have some soldering basics. I knew that right away from the thumbnail. But probably it should have been stated in the beginning of the video I guess.
Mine died after 9 years lol
Well fuck it i'll just buy new monitor...