GS error code OBO 30000 (self diagnostic test)

[craganmoor@earthlink.net (Cobey Myers)]

I have a rom 01 GS that I bought new in '87. It has served me well but,
seems to be getting tired. When I move windows around, it won't do screen
re-draws correctly and within 30 sec. or so hangs or crashes. When I ran
the self diagnostic test (control,open-apple, option, reset) I get "SYSTEM
BAD" and this error code: OBO 30000. I have the APPLE IIGS TECHNICAL
REFERENCE book but it was no help. Any thoughts----other than new
motherboard time?   :>)

Thanks,

Cobey Myers