The Power Macintosh G4 is series of personal desktop computers released by Apple in 1999, and sold through 2004. This page is for the M5183 designation.

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G4 will not power up after a local power outage-Fuse?

My G4 is totally dead. Flatlined.

I took it to the Geek Squad at BestBuy and they were great. He checked the power supply; OK. The motherboard, nothing. Spent the better part of an hour trouble shooting to no avail. The Geek guy was good also, he said he was a recent Mac convert. He didn't charge a dime. A class act.

My question is, could it be as simple as a main fuse? I have no idea where to look for it. There must be one on it somewhere. Also I cannot find the serial # anywhere, inside or out. I'll have to dig up the old invoice.

Thank you for any help.


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In worst case scenarios, the power supply will fail, and the motherboard too, If the voltage is overloaded, The motherboard will not die, unless the power supply has failed, and let too much voltage into the motherboard, try reseting the PMU(Power Management Unit) hold the power button for 10 seconds

, it might make a tone, and flash the power light on, and off. If not, check the motherboard for a button, press it, and this will reset the PMU/PRAM. If this doesn't do it, check the connections, all of them reseat the following: RAM, Graphics Card, Power Supply Connector, Other Expansion Cards (If Present). If this doesn't fix it, the system battery might be dead, and it needs replacing. Older macs would not boot if the battery is dead.


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