[sgi_tx]

I have an ip28 indigo2 R10K system with 640mb ram... was working perfectly well when I last used it a couple of years ago. Turned it on this week and nothing - no power light, no fans spinning, nothing on the display and no chime.

I thought the PSU was bad so I removed one from an R4400 Indigo2, but it exhibited the exact same behavior. No sounds or lights.

Next, I disconnected the drives, removed all the cards (fiber network and solid impact), reduced the RAM to a couple of SIMMS and tried again. Same issue. No sound, no power lights.

Finally, I swapped out the RAM for a couple of other SIMMs, removed the CPU entirely and reseated and secured it. Shook the case to dislodge anything on the under side of the motherboard that might be shorting things.  Nothing happened. Same issue.

Any clues as to what might be happening? 

Will R4K supplies work with an IP28?

Can anyone point me to instructions on how to get the riser card for EISA expansion out? And then the whole mother Board.