Your Go-To Desktop PowerPC

[bobesch]

...
(As you can also see, the standoff post to the right of the CPU came out with the spring / screw combo. The same thing happened on the 1.33Ghz PowerBook G4 12". I glued them back on with Versachem 2-part Quick-set epoxy. So far so good). ...

Oh, sorry about the broken spring-screw-combo. Too bad: I was about to send some response about that particular screw after you did mention, that you were about to repaste your little PowerBook's CPU.
Same happend to me (and AFAIK to @CooperBox too).
Maybe it's a design or manufacturing flaw, but I think, my fault had been not to keep the heatsink firmly pressed against the processor until both spring-attached screws were fully released so avoiding the heatsink from beeing jammed up on either side and broke the screws attachment to the board.

 

[AphoticD]

I don’t think it’s anything you did wrong. I think it’s probably just years of heat and spring pressure causing the factory glue to eventually let go.

It’s not the brightest design idea. I noticed my iBook 12” 1.33ghz also has the same style mounts glued to the logic board, except there are four of them (CPU + GPU). As I was working on it, two out of four mounts lifted straight off the logic board.

I would have preferred to see a couple of holes through the PCB and screw mounts on the chassis or bottom case instead of something glued directly onto the board.

Or even better (to avoid any movement in the case flexing), just screw the mounts onto the board from the underside.