Haas vf0 no boot no memory?

[Dyh]

Anyone had this issue where the machine won’t boot just shows numbers on crt that change every power cycle and a beeping, seems if I enter the monitor screen ( holding program/conversation on power up) it brings up the info but no flash or bbu ram

Seems to allow m code, but does nothing, have power on all boards all 8 lights on PGM is flashing hard to tell if HAULT is on or dim (looks on).
Any suggestions would be great.

 

[Dyh]

It’s on a 1995 vf0

 

[plastikdreams]

Have you looked at the memory board for any burnt connections or components?

 

[Dyh]

Pulled the board, couldn’t see anything wrong may have to get a closer look, tried reseating all socketed chips on it made no difference.
It seems strange how it can’t find either bbu ram or flash, thinking it could be eprom failure possibly but it does allow commands in the monitor screen, is there any commands I can try to bring up more data?

 

[laurencen]

do you have battery to keep memory? few years ago the battery went bad andlost all memory on a TM1

 

[EmGo]

Any suggestions would be great.

In any peecee or workstation I have had, the system starts up at the BIOS or PROM or whatever the architecture is, checks the memory, and if that's bad, refuses o go farther. Next place I would look is, bad memory. It does die sometimes, just from old age or something.

 

[Dyh]

do you have battery to keep memory? few years ago the battery went bad andlost all memory on a TM1

Yeah battery is good