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mad ux1200s

hi,

one of the UX1200S boards of the ai-group here at University of
Saarbruecken got mad some days ago: it just stops working doing
nothing any more not even giving error messages! :-{ Trying to get the
board up again, we rebooted the sun 4/370 server hosting the ux1200s
and got the following error messages during the autoconfiguration
process:

Aug 18 13:36:47 ai-gate vmunix: ivory16 at vme32d32 0xfd0c0000 vec 0xe1 
Aug 18 13:36:47 ai-gate vmunix: BAD TRAP
Aug 18 13:36:47 ai-gate vmunix: (unknown): Data fault
Aug 18 13:36:47 ai-gate vmunix: kernel write fault at addr=0xff0980e0, pme=0xff0
7e860
Aug 18 13:36:47 ai-gate vmunix: Bus Error Reg 10<VMEBERR>
[and now the usual stack trace follows...]

We phoned Symbolics here in Germany and they want VERY much $$$ for
repairing the board in 2 or 3 weeks or a few bucks less if we would
like to wait for 2 or 3 months (warranty? only one year... :-{). So
I was asked if I could help. Here at DFKI we have a few other
UX1200S-boards around I could use to change memory or other parts but 
I've no hardware documentation or (sophisticated) testing equipment.
Does anyone on this list have any ideas what I could try to fix the
board myself?
(The error message seems to point to some failure of the VME-BUS
interface, perhaps some(?) registers couldn't be written to...???)


Thanks in advance,

-kurt
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Kurt Schreiner                          VOICE: +49 681 302 5270
German Research Center for AI (DFKI)    FAX  : +49 681 302 5341
Stuhlsatzenhausweg 3                    INTERNET: ks@dfki.uni-sb.de
D-W-6600 Saarbruecken 11, Germany         
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