It boots to a point then shuts down
Hi, I'm new to ifixit, loving it.
In brief, I bought a Power PC Quicksilver M8493, and to be frank, was diddled. When I got the machine home I discovered it had no HD.
Upon pressing the power button I'd get a glow, but no action.
I did a lot of googling and changed out the PRAM battery, pressed re-set etc and started to get a partial boot.
I left the machine for a while, returned and got a full boot to folder with flashing ? no surprise there as there's no hard drive.
It would hold on the folder screen and then shut down. I subsequently discovered that if I left the machine plugged in all the time I would get the boot to folder screen, most of the time. If I unplugged for a while, it would go back to glowing button.
I did some more googling and followed the procedure of
(a) unplug everything
(b) press power button
(c) remove pram battery
(d) press reset button next to pram battery
(e) reconnect and reboot
this resulted in the same glowing but inactive power button issue, and after a while of being plugged in, I'd get the partial boot.
I also did the boot with CMD-OPtion P R held down, this resulted in one instant reboot, then nothing.
From my further googling and forum searching it's looking like it may be a PSU problem?? and help would be much appreciated