i'm working on a fanuc r30ib that his cpu doesn't initialize
just a dark screen apears
the led alarm number didn't show up nothing, and i'm searching about the led status of cpu, but i don't find out where this can be wrote
i tried to:
switch the TP
switch the FROM board
checked the fuses
looking superficially to see if there is some fried in CPU
the painel was working perfectly, i just want to know what may have happened to kill the CPU
thanks for the attention
