I inherited this particular poor, lost & unbootable PowerMac: this one is a 2000 model G4 Graphite Tower from a good friend of mine: Tom Crane at Crane Advertising.
The box doesn’t boot, I can press the power button hold it down–it just sits there like a brick should and a computer shouldn’t. I first tried removing the battery, clearing the PRAM and leaving the battery and it unplugged for days.
It could be one of three things: The Power Button (which I manually closed the gap on the jumpers as a Power Button would on the motherboard), the Logic Board or the Power Supply. My first instinct was the Power Supply. But a replacement Logic Board was MUCH more inexpensive.
Here’s the reason why this power supply is so expensive to replace. The connector towards the end of the AGP card is actually a monitor power supply. This is powered by a set of two extra pins on the ATX connector feeding to the motherboard, which makes the Power Supply a fairly specialized item…. the rest of the components are pretty standard–ATA drives (which I plan on replacing), AGP graphics, PCI slots, USB, 1394, etc. This was a time when Apple wanted less cords for their computers. Eventually I suppose that this caused more headache than it was worth and they dropped this design in lieu of just a simple all-in-one LCD monitor like computer.
After all this, it imitated a doorstop exactly the same as before, so it appears that it probably is a failed Power Supply. I’ve removed it from the case and I’ve taken it to work so that I can have David take a quick look at it and he agrees: it’s a dead Power Supply.
Oh well, good news is that I found a refurb for $80, and we’ll see how it works on the next installment!