[weblacky]

However, the Indy PSU is one of the most accessible and simple SGI PSUs out here. It's also the ONLY PSU I know of that you can troubleshoot with it attached to the system and ON. So it makes it the most repairable among all SGIs (to me). Most SGIs, used an enclosed design with multiple PCBs covering each other to prevent being able to reach inside the PSU when assembled, let alone while it's installed in the system's body. The Indy platform is the only one to buck that trend.

It also has minimal semiconductor circuitry. I'm told by old SGI postings (back in the day) that the fast switching secondary diodes were a source of failure, but that doesn't make then unrepairable. I've only seen inside a Nidec PSU. But those turn to be the better PSU in the long run these days (IMO).

I got a dead Indy Nidec PSU I have disassembled and had the PCBs washed to properly to troubleshoot it, was lucky to spend $20 on eBay for it...but SGI PSUs, dead or otherwise, don't come up too often and the prices are everywhere. I'm in the market for failed PSU for repair, but most people are either keeping them or throwing them away :-(

We've only just started building up the knowledge for PCB-level repair (beginner), SGI parts used to be so cheap, most people just bought another used part and threw away the old one (unless it was rare or expensive even back then, 10+ years ago). Now all that trashed inventory is causing basic part scarcity!