[purplemaji]

I have a PowerMac Dual 533. Recently we had a power outtage, and now the Mac now will not start up. When I press the power button on the front of the tower, it lights up so long as it is depressed, but when I remove my finger, the light fades. Holding in the power button does nothing. There is no other response from the computer that I can see.

The computer is on a surge protector, and none of the other devices on the surge protector show any damage. I haven't shut down the Mac in probably 6 months, although I have restarted it when installing updates. I don't know what other information would be helpful.

Does anyone have any ideas as to what could be wrong with the computer, and anything that I could try to get it to boot up? I wasn't really planning on replacing the computer for some time yet, so any suggestions would be greatly appreciated.

TIA,

PM

[P]

The actual switch might broken. Or it might be that old mainstay, a PRAM battery that has gone dead. You could try replacing it - check inside the machine for the exact type, but it's usually a 3.6 V Lithium battery.

[purplemaji]

I had to reset the power management unit. There is a small button in the case located next to the battery that you mentioned. Unplugging the computer, pressing that button a single time, waiting 10 seconds, and plugging the computer back in and pressing the power button was what was required to get it working.

Thanks for your response.

PM

[Eriamjh]

This has happened to my Quicksilver DP800 a few times. Your procedure is exactly what you should do.

Warning: do NOT EVER press the CUDA switch (that little button on the mobo) twice in a row. You can crash the PMU and the computer will not ever restart. (At least, that is what I have read.)