M4984 G3 Imac 233 mhz Rev B preservation steps

[bobconan]

I have a new to me M4984 Rev B that turns on. I understand there are some common problems that affect the longevity of the systems. To that end I opened the machine up but everything looks clean. All caps are in shape w no leaking.

Are there known capacitors I should replace anyway?

This is the first and only mac I've owned so assume I have no history of the machines or philosophy of design.


Thanks

Bob

 

[Byrd]

Noting the sheer amount of caps and expense replacing these, if it all looks OK I’d keep everything on hold unless issue. Maybe check PSU/PAV voltages when on to confirm things look OK. Stubborn startup issues and crashes will indicate failing caps. A lot of rev a-b iMacs it’s the flybacks going now too, usually obvious though with random noises and jolts in normal use.