[Luke]

An LED that is briefly orange is fine. This means that the various power-on tests are running, the LED then turns green once these are passed successfully.

Thank you. I am a bit noob in sgi world. So the atx psu and the computer are working fine. Now i have to choose between repairing the original psu or converting the atx psu.

What would you do ?

[Trippynet]

Converting an ATX supply will be extremely difficult, if not impossible. As Jan-jaap says, they simply don't kick out enough current on the correct voltage lines to properly replace the Indigo2's supply. I'd love if someone could find a modern PSU that could be re-pinned to work, but I doubt it.

Repairing Indigo2 PSUs can also be very difficult. There are some guides for replacing caps that fix things, but you have to know what you are doing.

Personally, I have one that I sent to a PSU specialist repair company in the UK. Cost me over £100, and despite them re-capping the entire PSU, it still had issues when I got it back (died after about 30 minutes of time). Following a further repair from them, it now does nearer 90 minutes before my system abruptly dies, but that's still not perfect. I sent it back again last week and am expecting it back soon. Will this have fixed it for sure? Who knows!

I should add that the firm that "repaired" it gave it a 1 year warranty, so the subsequent trips back have only cost me about £8 postage each...

Of course another option is to buy a replacement and working Indigo2 PSU. That might be the best bet for now, but don't chuck the faulty one...

[Luke]

I measured the current drawn by the computer, in idle at the prom monitor we have:

12v 0.6A
3.3v 1.8A
5v 13.5A

For a total of 80W

And we are just doing nothing, i would imagine that when the unit is under load the current will increase.

[GRudolf94]

Heh, sorry for the delay replying again, been traveling;

A stout ATX PSU will be perfectly fine on an Indigo2 without IMPACT graphics - I'm working on a solution to use IMPACT from the 12V rail on a newer PSU. The original connectors are, if memory serves, Molex KK396...or another KK series.


So we have two partial successes converting to ATX so far. Impossible? Don't think so.
http://forums.irixnet.org/thread-172.html

[Irinikus]

What about maybe making up a linear power-supply for it?

[Luke]

It's undoable. You will have to sink lot of power in heat.
I think that desining a new smps is the right way. So we can pay more attention at the 5v rail.