FREE: SGI IndigoR3K 2M SIMMs

Jochen, Exactly how did the power supplies in your Indigos die? My first one would power up momentarily and then go into shut down. The other was even stranger, the CPU would power up but then the power on diagnostics would report that the keyboard was bad or missing and that there was no hard drive attached. I noticed that the hard drive never spun up so I checked for 12 VDC at the drive connector and found that it was down to about 1.3VDC. I traced it back to the small circuit board in the power supply. I then pulled that board from the other supply and put it in the second supply and it worked. (Yeah, Yeah I know all about testing with a dummy load, etc etc for all you arm chair critics out there!) Indigos seems to have a real problem with power supplies. Does anyone know why? The next time that mine dies I think I'm going to check on replacing it with a power supply from a PC or some of the Lambda switching power supplies that I've been scavanging from old test equipment or ???. Does anyone kow if there are any special requirements for the Indigo power supplies? Do the voltages have to be applied in a certain sequence? Is over current protection *required* and if so on which power lines and at what current? At 09:10 AM 5/9/02 +0200, you wrote: Do you have any spare parts that you're willing to part with? :-) Joe