Rod Hagen

It sounds like an issue with the bonding of the GPU to the logicboard to me, samianlife. The primary problem with the NVidia 8600M GPUs in 2007/8 MBps is not that the chip itself actually fails, but that it generates temps that mess up its connection to the board as I understand it. If this is your problem (and you have an MBP with the NVidia 8600 processor) then it should be covered by the Apple Extension repair Program ( see http://support.apple.com/kb/TS2377 ). If it is not covered then it is usually either a matter of replacing the logicboard, or of finding someone to "reflow" the GPU connection (which is still expensive, but not as expensive as a logic board, requires specialist equipment and is hard to find someone capable of in many areas). Without repair the problem is likely to get progressively worse, I'm afraid. Cheers Rod

Why didn’t you simply use a sharp knife blade to carefully / gently slice through the adhesive, as suggested by various contributors? No pressure at all needed then.

Worked fine for me, too. In my case I had had to replace the original “feet” with a couple of stick on plastic ones. The cover seemed a little loose after removal and replacement , so I added a small piece of invisible tape along the lower edge. Working beautifully now.