Il giorno 08/07/17 01.19, "smac0031" ha scritto:
> Monday my DA G4 died. I had it on an APC 650 UPS. I woke up and alarm was
> going off and the green light was flashing.
The alarm and the green light are about the UPS, right?
You should investigate those in the UPS documentation.
> I turned off the UPS and turned it back on. At that moment I heard sound
> somewhere between a zap and a pop.
>From those sounds, I'm prone to think it was the power supply going kaputt.
> My DA G4 was nonfunctional.
Of course, without power supply, the Mac looks totally dead. Even if the
rest of it is perfectly fine.
> I don't understand why this happened. The thing should have been
> protected.
>
> None of the other computer gear I've got, cable modem, router, TiVos or
> anything else on my network was damaged.
Either the UPS did something wrong, or it was just bad luck: when you
switched it on again, the G4's power supply just decided it was its final
straw. Sometimes it's just coincidence.
But I would test that UPS on something cheap, to check if it's defective
(and if it is, and it's under warranty, maybe you could get some money from
APC).
> There is no way of telling what the damage is.
Simplest way would be to insert a working power supply and see if the G4 is
ok. But find one could be hard.
I know there are info on the Net about using an ATX power supply (for PCs)
on G4s. I don't know how difficult that is.
> I have been having a recurring problem with it. Sometimes when it boots up
> it won't recognize any input from the keyboard.
> [...]
> I finally swapped the keyboard cord
> to another spot on the usb hub and it started working.
This definitely looks like an USB problem. If those devices run through an
USB hub, maybe it's the hub. Or it could be the USB card.
Try a different USB port, a different hub, or a different USB card.
HTH,
Valter
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