My 5 yr old 2 GHz Intel Core Duo 20" iMac, right after I disconnected an external HD that had been on the desktop (i.e. I forgot to eject it properly), started displaying video anomalies (lines); testing (TechTool Deluxe 3.1.3) indicates the video is failing. The graphics card is an ATI Radeon X1600. Is this reasonably replaceable? If so, is the "MPC ClientPro 434 All In One ATI MXM X1600 PCIe 128MB Video Card" I found on eBay (for $25, used) essentially the same unit? My soldering skills are, sadly, poor. And it only dawned on me a couple days ago that because this iMac does not have a Core 2 Duo processor, it will not be able to enter the "Lion" generation. Thanks, Patrick PS Are manuals for this model available? I have a copy of the Peachpit Apple Training Series "Desktop and Portable Systems, Second Edition" but it only goes up to the G5 20" iMac. There doesn't appear to be a 3rd or later edition in the series.
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