Don

My optical drive is dead... do I have to replace it with an identical model? Ifixit doesn't seem to have the part for a mid 2010 iMac?

Cita de Doug:

The two screws removed in step 3 should not be mixed with screws in steps 5 through 7. Though similar, they are actually slightly shorter and have a bigger head. If you put the longer screws back in here when reassembling, the button to unlatch the top will not work properly.

I think you may have commented on the wrong page. This page only has 3 steps, and the screws are removed in step 2, not 3.

(MacBook Pro 15" Core 2 Duo Models A1226 and A1260 RAM Replacement)