Ultra 5 boot issues--no video, garbage on serial console

My Ultra 5 didn't come back after a power blip. It powers on, but
nothing displays if I attach a monitor. If I attach a serial console
with the correct settings it spits garbage (the terminal settings are
correct) Tried the Stop N, Stop D stuff, same result. No POST lights on
keyboard. Tried removing/reseating the hardware, same result. Read a
little bit about nvram issues, but didn't see this as a symptom, is it?
Or did the power blip fry something?

Thanks!

 

If you are sure your Nullmodem cable is correct then go and get a new
machine.
In this case the U5 CPU or Mainboard is dead. Had this with another U5
myself.

 

Hi,

If you have a multimeter, verify all voltages from the PSU.

You have to surf/Google around to find the needed voltages, if you can't
find them let us know I can check on a U5 here then.

/michael

 

You can also find the values in Sun's Ultra 5 service manual. I also
suggest checking
voltage levels -- the power supply in my Ultra 10 died a while ago with
similar results.

 

Have you tried other speed/parity settings anyway?

Does the garbage interact with the keyboard? (do you just get a single
stream of stuff, or pieces over time?)