Hello everyone,
I'm in the process of widening my horizon from vintage keyboards to vintage computers
That's why I got myself a 5150.
Unfortunately the board (64-256) is "dead"..
Of course I followed the diagnostic process on minuszerodegrees, which first lead me to a failed PSU, which I changed.
After that I changed ALL the tantalums on the board, just to make sure, nothing.
I also tried to piggyback the RAM chips, which did not help (but does not alwas work, as I read)
Observation:
- CPU and Clock Generator are warm, CG even HOT, is this normal for a "halted" system?
I really would try the Landmark Diagnostics, but have no idea how to obtain such an chip (and adapter?)
Now my question:
Is there anyone (preferably in europe, I'm located in Germany) who could provide me with a Landmark BIOS AND a 5150 BIOS (3rd rev)
I'm williong to pay good money for it
Is there something else I can try without logic probe or oscilloscope?
Thanks guys,
Fabian
I'm in the process of widening my horizon from vintage keyboards to vintage computers
That's why I got myself a 5150.
Unfortunately the board (64-256) is "dead"..
Of course I followed the diagnostic process on minuszerodegrees, which first lead me to a failed PSU, which I changed.
After that I changed ALL the tantalums on the board, just to make sure, nothing.
I also tried to piggyback the RAM chips, which did not help (but does not alwas work, as I read)
Observation:
- CPU and Clock Generator are warm, CG even HOT, is this normal for a "halted" system?
I really would try the Landmark Diagnostics, but have no idea how to obtain such an chip (and adapter?)
Now my question:
Is there anyone (preferably in europe, I'm located in Germany) who could provide me with a Landmark BIOS AND a 5150 BIOS (3rd rev)
I'm williong to pay good money for it
Is there something else I can try without logic probe or oscilloscope?
Thanks guys,
Fabian