The MMSC fails in the display if I'm not
misstaken, perhaps a
replacement LCD could be found? But you should be able to fire up the
whole system with just one.
My understanding is the MMSCs are far more prone to
fail than the screens.
The MMSCs will bring up the NIC lights on start, so I've been using that
as an indicator and only one seems to work.
More importantly, unfortunately, every rack needs an MMSC to fire. The
MMSC connects to the MSC to co-ordinate the power sequencing of the
modules and each MMSC can only talk to two modules at once.
I'm mixing things up here. I think the MMSC PSU tends to fail, have you
tried to swap them around?