iMac G5 does not boot. gray screen. no power in usb.
I recently aquired an imac G5. when I turn it on, the power light comes on, the drives and fans start up, there is a cd stuck inside so I cant boot from cd drive. and the screen lights up gray. The usb ports supply one flash of power at first, then nothing.
I opened it up and removed the logic board and power supply to see if there were any obvious problems such as bulging capacitors, there are no such problems.
a stamp on the logic board says "apple 820-1212-A"
how can I do further tests to find the cause of the problem?
Is this a good question?