LCD Monitor Repair
Monday, October 18th, 2010 at
10:58 am
Trouble shoot and repair of Optiquest Q7B-3 computer LCD monitor. It would not turn on only clicked over and over again. Traced problem to a faulty capacitor in the power supply.
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US $159.99
@kirkconway It could be capacitors gone bad, but it’s hard to say without trouble shooting. It might be something else wrong. If your not a technician, I’d advise you to not take the monitor apart.
@kirkconway You really need to open it up and have a look at the capacitors on the power supply board. If any are bulged, you stand a good chance of repair…
Ive got a Proview 19 inch LCD monitor,
turn it on,
boot’s up, all window’s come up,
but then it goes black and stay’s like that,
Hear a slight hissing or crackling noise,
Please Help ok,
Kansas Guy,
was the montor for you dad???
wow. So very grateful of this video. I just picked up one of these monitors from the trash (who the hell throws out LCD monitors?!) and had the exact problem you just described as well the IDENTICAL cap you replaced looks like it’s popped on my power supply board. Will pick up some caps to see if I can bring this beast back to life. If it works im selling it for 80$…Who knew you could find money on the ground.
Recently when I turn off my monitor it turns white because the lamps inside dont turn off. I opened it up and noticed 4 bulging capacitors.
Will replacing these fix my problem?
i have a problem with my emachine 19in monitor, it simply does not turn on sometimes and needs almost a day for it to be on, any 1 with any idea how this can be fixed
i have a problem with my emachine 19in monitor, it simply does not turn on sometimes and needs almost a day for it to be on, any 1 with any idea how this can be fixed
Fixed an Optiquest Q9b-2 using this same technique – Radio Shack had a 1000uF @ 35VDC capacitor that worked just fine. Just $1.79 later and I have a working monitor!!! Thanks for posting this video.
but usual you can look some line on the monitor gren red blue or any stuff like ” no signal ” if don’t get nothing tha mean you lcd is done you need to open and check the power suply…
Did you verify your video card is working by testing it with a known working monitor?
If so and you’ve confirmed you have video signal from the PC then its back to tracing out the problem in your monitor. If it was a power surge its most likley in the first stage of the power supply.
I tested for bad defective capacitor and all were good. one day it was raining and the light went out, and when the light came back my pc started but my lcd dont. what else can go bad ?
I did test the capacitor with the VOM and it was shorted. Capacitors sometimes bulge like this one did when they go bad with a short.
I know what you mean when you say you miss it. Last time I was working at a electronics repair shop was 19 years ago !!! But I still do repairs and enjoy my Amateur Radio hobby
So, were you able to find the defective capacitor simply by visual inspection? Good job! My degrees are in electrical engineering, but I’ve done almost nothing electrical at work in the last 15 years. I kinda miss it.
Damn! And to think I threw away an otherwise perfectly good ten year old TVM CRT color monitor that wouldn’t come on when I hit the switch because all it might have needed was two 470 microfarad capacitors in parallel? Double damn!
Sure wish I knew what I just wrote
Thats right !! LOL
So now you have a larger monitor..to go with your power washer….not bad.
@BasicModelling Yes bananas Rob !!!!
@littledogalienhunter LOL
I’m currently fresh out of Optiquest Q7B-3 computer LCD monitors..
..but should I ever need to repair a Banana, then I guess the same principles will apply..
All I can say is…..I’m monitoring you on this one!
@bugsinrug Thank you !!!!
@SkyFitsHeaven24 Thanks Steve !!!
Good job Chris! WooHoo!
luv ya!