Does my eMac have bad capacitors.

I'm using a eMac USB2.0 model, but it always freeze after 5 or 10min using. Somebody suggested me to change the RAM mouth ago, and I did it. It still has the same problem.
Also, when it freezes, there is strange spotted areas appear on the screen. So I thought something wrong with the video card. So I updated my driver. Still...
I looked some posts said that my capacitors in the machine have problem. So please tell me what to do for checking and fixing.
I can't contact Apple for help, because Apple China is ********. I'm China right now....
Message was edited by: Michael Hu Zheh

Brian,
I have a USB 2.0 eMac and recently began experiencing the raster shift problem of the pre-USB 2.0 eMacs. Per many of the answers I read on the boards, I assumed it was just a bad iVad cable which costs about $25. Not being handy with computer repair, I took it to an authorized repair shop. After an analysis, they said the "entire analog sub-assembly and logic board" would need to be replaced for about $700. Needless to say, I didn't have it repaired as I thought that they were just trying to pull the wool over my eyes. After reading your comment about the iVad cable being a problem with pre-USB 2.0 eMacs, I'm now wondering if they were right. I'd still not fix it, but do you know if thier diagnosis makes sense?
Best regards,
Jim

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