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Problem with LCD screen

C

chuboy

<- It was THIS big!
I have a 17" widescreen LCD TV/Monitor (Samsung LS17N13W). It's worked fine, then it didn't get used for a while. I tried using it and there seems to be a lot signal distortion or something, I'm getting a lot of coloured vertical bars or pixelatated patches. I can still see picture, just not cleanly. I have pics of it:

Playing MarioKart DD on Wii
http://img329.imageshack.us/my.php?image=dsc00044af9.jpg

Closeup of logo in bottom right. Notice the pixelation/bands.
http://img395.imageshack.us/my.php?image=dsc00045cs4.jpg

Default screen: source attached but no video signal
http://img403.imageshack.us/my.php?image=dsc00046en4.jpg

"Check signal cable" message. Notice the bands only appear under the box; the black around the message is still the screen, just black.
http://img403.imageshack.us/my.php?image=dsc00047xc9.jpg

Please don't post a reply saying 'it's broken, take it to a repair shop.' I KNOW I can do that. I want to know what's wrong with it. Am I able to fix it myself, with a little electronics knowledge. What is it a symptom of?

Thanks in advance.

P.S. If it's of any relevance, the DC IN plug is slightly loose, sometimes it takes a bit of a wiggle before the screen will stay on. I suspect maybe it's a power issue but who knows.
 
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