I replaced the PSUs in the AlphaServer 4100 yesterday and… they work but the machine still isn’t starting up. Nothing on the LCD panel, nothing on the terminal port.
I’ve swapped CPUs around, run it with 1, run it with 2, yanked all but 2 boards of RAM… I am at a loss really what I need to do next. I am starting to think either the system board or the PCI backplane system is bad. Either that or the PSUs are just not working right under load or something. The plethora of diagnostic LEDs shows no fault that I can see and so isn’t helping me diagnose it.
I don’t know the ‘Rawhide’ series Alphas nearly well enough, evidently, so I am now looking for outside help. I’d hate to have to write this machine off but it’s looking pretty grim.