Anyone out there done a conversion or know a fair bit about wiring and such? I'm trying to get my RaidMAX 500W ATX Power supply converted and I'm 90% there, but the darn thing won't power up for more than a split second. I know this is due to the PS_On or PWR_OK wires....but nothing I have tried seems to work here!

Anyone have time to offer some assistance?

20 pin main connector with what looks like 2 sets sense wires bundles into the clip. Brown/Orange and Red/Red. These have been soldered together, but may not have been soldered to the original wires they came from since I noticed them after I clipped the main harness off. I assume the brown can go to any Orange(3.3V) wire and be fine, and that the small gauge red can go to any other red (5V) and be fine.

I have a green wire which came from pin 14 and should be the PS_On wire.

I have a grey wire which should be the PWR_OK wire.

I have a purple wire which should be the +5V Standby wire

I have connected 6 yellow (+12V) wires to each of my red binding posts (gonna run 2 sets on this PSU), and 6 blacks to each black binding post.

I installed a 3W 12V LED for power indicator, which I connected to ground and the 3.3V rail (Orange wire).

I installed a 10Ohm 10 watt resistor on the +5V rail (red on one side, black on the other)

There is a switch already on the back of the PSU. When I plug it in and flip the switch, my LED flashes and that's it.

I have tried grounding the green wire and the grey wire (separately and both at the same time). I have tried connecting the grey wire to both the 3.3V rail or the 5V rail. All I ever get is a blink.

I'm driving myself insane here. Any electrical guys out there wanna help me out?

Sounds like you have it set up correctly. I would suggest posting good high res pictures of everything. It may help people figure out whats wrong.

I know the first couple of times I tried my power supply it didn't like working. It would make funny noises. It seems to have worn its self in. Have you tried to hook up a load before you turn it on? Try pluging in something like a simple computer fan to the output and see if that helps.

BAM! Got it working. I mistakenly bundled the blue (-12V) wire in with the blacks on one terminal. Quick little snip and it works like a charm ;-)

Finished product...

What's your output with this setup?

My multimeter apparently doesn't want to play nice. Should be somewhere @ 30A if the label on the PS and the actual output are close. My guess is 20-25A @ 12V, but we shall see.

looks good. I've pulled close to 20 amps out of my 25 amp unit and its never gotten warm or given me any troubles.

I like your light, I went fancy also and added a power on light, standby light, and on/off switch since mine didn't come with one.

My next planned upgrade is to do away with the binding posts and switch over to 5mm bullets. The back side of the binding post is such a small connection.

I actually soldered all the 12V and Ground wires to a piece of metal and then just bolted that piece of metal to the binding posts. Made it easy to put together. I still need to glue the LED housing in place, but at least it works! Looking back though I should have put the binding posts on the non grated side. Would have been a little more solid when mounted, but they work just fine.

Luckily this PSU had an on/off switch already built in for me ;-)