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PowerMac wont restart - USB ports deactivated

B

BlockerKiwi

macrumors newbie
Original poster
Hi, after some help....

My G4 PowerMac QS 733 running 10.5 wont restart. My daughter says it was going when she used it, but that a message came up that the USB port which had the mouse in it was being deactivated because it was drawing too much power. I think the mouses cord was damaged. She moved the mouse around the ports, and the computer deactivated them all and then shut it self down!

I have tried plugging in other keyboards and another mouse, but to no avail. I have unplugged everything, including power. Now the when I try to restart, the start up light on both the screen and tower just flash as if the Mac is asleep, but the Mac doesnt start up and I get no start up tone.

Any ideas?
 
This reads to me like a serious hardware issue, possibly a motherboard failure. With no startup power, other than the brief light flash, you cannot realistically use the original install dvd/cd and run a hardware check; nor Disk Warrior. I would suggest you take the G4 to an Apple service technician who can run a series of tests on it.

Second thought - if repair cost is going to be prohibitive, rescue the hard drive for use later, and consider a replacement computer.

Edit: A second, second thought - what about resetting the PMU? See http://docs.info.apple.com/article.html?artnum=95037 and http://docs.info.apple.com/article.html?artnum=95035
 
Solved

Thanks Hugh, it worked! I reset PMU and PowerMac restarted!

I now have a happy daughter who is studying professional photography, and her work was on there!

Thanks again.
 
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