Starting a new thread because the old one makes it sound like it is about the power board and probably many people aren't familiar with the power board. I think the power board is fine. Voltages are fine.
Keyboard plugged into it blinks it lights at power on, so it is getting power.
The system was working, then it froze, when I power cycled it after that, it never came back to life.
I've looked at the two oscillators on the board (48M, 40M) and both are running.
I don't see any activity on the ROM's on the A0 pin.
I don't see any activity on the data pins of the parallel port which I think should have post codes.
I've tested the RTC and it doesn't seem perfect, but it does run sometimes so I don't think this is the issue (because I don't see the system even trying to do anything with A0).
Reset is high.
Any ideas on what to check next?
Keyboard plugged into it blinks it lights at power on, so it is getting power.
The system was working, then it froze, when I power cycled it after that, it never came back to life.
I've looked at the two oscillators on the board (48M, 40M) and both are running.
I don't see any activity on the ROM's on the A0 pin.
I don't see any activity on the data pins of the parallel port which I think should have post codes.
I've tested the RTC and it doesn't seem perfect, but it does run sometimes so I don't think this is the issue (because I don't see the system even trying to do anything with A0).
Reset is high.
Any ideas on what to check next?