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post #11 of 35
Quote:
Originally Posted by Mattshewster View Post
Hey, I opened it up and all the capacitors inside look like they are in perfect condition. What else might be wrong with it? I really don't want to buy a new monitor if I can fix the one I have. Nothing inside looks bad and yet it continues to turn on and off. It seems to be deteriorating as it no longer stays on if left alone for a while. Help please!
Does anywhere on the screen feel warm after it has been powered on for a relatively short amount of time? -This can narrow down which component could be bad.

I haven't had to replace one on a desktop screen before, but if you dig a little deeper into the screen you might be able to find the cold cathode fluorescent lamp. In a laptop I've seen the end break and melt part of the screen.

edit: The ccfl might not be the issue, as the noise I remember was more of an electrical arch. If you haven't already done so, remove the power board (the one that the power cord plugs into) and check the underside. There are more/smaller components there that can be causing you trouble.
Edited by Fir3Chi3f - 6/20/11 at 11:00pm
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post #12 of 35
Thread Starter 
I'll check the power board and see if I can't get some pics up. Thanks for the suggestions.
Edited by Mattshewster - 6/22/11 at 1:01pm
    
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post #13 of 35
Thread Starter 
just opened it up again and removed the power board. I noticed a bit of soot or something near one corner of the power board. I removed it and looked underneath and found that there is one component that looks as if it has gotten quite hot. It is a small component less than 1 cm square. It has a piece of clear plastic glued to the top of it. It appears as if the component has gotten hot enough to melt the glue as the plastic is skew and there is glue smeared on it.

Is this the problem and is is reparable? I live in an area where it is difficult to buy electrical components so I won't buy anything on a hunch. I really want to get this fixed ASAP. Thanks for all your input so far.

Edit: I haven't noticed the screen getting hot at all. Also, my parents say they can't hear the noise so it must be very high pitched.
    
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post #14 of 35
Pictures of it would be awesome. We might be able to help.
post #15 of 35
Thread Starter 
Here are the pics of the power board:





And here is what I suspect may be the problem:

    
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post #16 of 35
Just copy the DIRECT image URL, and put the URL inside [ IMG ] url here [ /IMG ] tags

Without the spaces of course.
Edited by De-Zant - 6/23/11 at 9:16am
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post #17 of 35
Thread Starter 
I think I got the pics up correctly now. Is there anything there that looks problematic or should I be looking elsewhere?
    
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post #18 of 35
ya you are right, that doesn't look good. hard to tell what it is though. kinda looks like some sort of spacer and plastic short prevention thing. im on my phone at the moment. but when i get home i will another look.
post #19 of 35
I see that at least one cap is Rubycon, which is a good brand, what are the other brands of capacitors on the board? Just because they aren't blown doesn't mean that the caps are good and I would suspect the cheaper caps if any are bad.

The sucky thing about caps is that the only really good way to test them is with an ESR meter. The next step might be to look up values of other components on the board and checking them with a multimeter.

You might also want to start a thread over at badcaps.net/forum they're a good group that do this sort of thing all the time. I'll post if I think/find something else. Goodluck mate.
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post #20 of 35
Thread Starter 
Looking at the other caps I see CapXon and OST.
    
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