G4 cube dead

[Samuel_Saady]

So, i hope theres another thread with a solution to my problem out there but i found nothing.

I got this g4 cube with the box and a psu for a great deal. Issue is, it wont turn on, When i press the power button, it lights up, then goes out and thats it. When i open the system up, the green light by the pmu is on and theres another green light on the pmu, but by the ram theres a red light thats on. When i leave it on for a while, it gets warm like its running like normal.

Theres no video coming out, and i dont have an apple monitor, but i do have a period acurate vga crt that i tried but nothing.

this is my first g4 cube, and id be sad to have to trade, because at the end of the day id rather have a working g4 tower than a dead cube.

 

[Byrd]

Reseat everything including the CPU, try known good RAM, new PRAM battery, test VRM

 

[Samuel_Saady]

swapped cpu, ram, pram battery is at 2.9 volts, pressed cuda switch. not sure about how i can test the vrm though.

 

[Byrd]

You're quick! I'd also check the PSU voltages, replace PRAM with new (it should be ~ 3.4V), and have a tinker with the power switch which can often be overly sensitive causing startup issues/shutdown.

 

[Samuel_Saady]

ill swap out the pram with a known better one, the psu i checked with a multimeter, it was at 26-28 volts.
I dont think the power button is the culprit here, it detects when i press it, but the issue is that when i take my finger off, the light goes out, and the computer just does nothing. but when i press and hold the power button the light does turn on.

when i press the power button the cube appears to turn on(lights on the logic board light up), but the power button doesnt stat illuminated, and it appears nobodys home, and when i press and hold the power button for 5 or so seconds, the lights on the logic board turn off like a forced shut down.

 

[Samuel_Saady]

Anyways, if i cant get this fixed by tomorrow, im thinking of selling this at swapfest

 

[Samuel_Saady]

is there anyone else that has had the same problem before?