JeffC's latest activity
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JeffC replied to the thread Iris Indigo - 12V rail problems.You could run it without the video board and see if it still freezes, that would narrow it down to the CPU board or video board. I built... -
JeffC replied to the thread Iris Indigo - 12V rail problems.Yeah the PSUs in these machines are complex. My other SGI is an Indigo2 Impact, and their PSUs are known to be quite problematic. The I2...
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JeffC replied to the thread Iris Indigo - 12V rail problems.I think this is solved. I ran two test leads out of the PSU, one connected to the 12V rail, and one to GND, so I could measure actual...
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JeffC replied to the thread Iris Indigo - 12V rail problems.I have tried with two known-good PSUs, and the symptoms are the same with either. Both PSUs also output 12V fine when bench-tested...
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Hi all, I am troubleshooting an IP20 Indigo (R4400/Elan) that was working until a couple months ago. Current symptoms on power-on are...