[Green Button]

When starting up machine CRT screen keeps blank and motherboard
led is using error "F"
Sometimes it have done this only mornings when machine is cold, and after 1-2 hours it has started, but now we cant start it at all.

I think it is optical fibre cable or in worst case motherboard
(about $10.000,00) or I/O board.
Any suggestions what can i do myself before calling Fanuc & byuing new parts ??

[Green Button]

Ok i found faulty part. It was power-card to I/O cards which was broken.
I was wondering if we could make new forum.We could get good database, if all faults was written and then how to repair fault.

So like this :

Fanuc 11-MA
Error description:
CRT blank, error code F in motherboard
Error repair:
Faulty power to I/O replaced


So folks, any idea or ??