PowerMac G5 won't power up

[MagicBoy]

PowerMac G5 DP that's been in storage for a couple of years. Just connected it up and it won't power on. A relay in the PSU clicks twice when the power cable is attached. Press the switch and the power LED stays on for a half a second, the relay clicks twice and the fans in front of the CPUs twitch and nothing happens.

I've reseated the RAM and graphics card. No change.
Removed all but the original RAM. No change.

Any suggestions?

 

[headsh0t95]

looks like your power supply has failed...

 

[poiihy]

Looks like it.
Do you have another psu to test?

 

[MagicBoy]

Only an ATX one.

I've seen some PowerMac G5s that had red diagnostic LEDs on them, not sure if this one does. If it does they're not lighting up. It's one of the first ones I think.

Looks like it's going back on the disposal heap.

 

[poiihy]

Only an ATX one.

I've seen some PowerMac G5s that had red diagnostic LEDs on them, not sure if this one does. If it does they're not lighting up. It's one of the first ones I think.

Looks like it's going back on the disposal heap.

Modify the ATX to fit the G5 board. Use jumper wires and/or pins or something.

Don't throw away the old PSU!! salvage the fan and some parts!! Reuse the enclosure! It has a fan so it would make a good hard drive enclosure! Then recycle the innards if you don't want them.

 

[Sergey.P]

Can be that the capacitors in the PSU have dried out, try to warm up PSU with a hairdryer for a test.

 

[MagicBoy]

Can be that the capacitors in the PSU have dried out, try to warm up PSU with a hairdryer for a test.

Worth a try. Storeroom would have been cold and damp. Don't own a hairdryer, I'll try the airing cupboard!

 

[Sergey.P]

Worth a try. Storeroom would have been cold and damp. Don't own a hairdryer, I'll try the airing cupboard!

Indeed it is, but don't overdo it, try to warm up strictly the PSU itself as I don't think the rest of the unit would appreciate being warmed up