I have a problem with
OKK MACHINING CENTER
MODEL : MHA-800 NC/TC
CONTROLLER : FANUC 9M
When system boot
BUBBLE#1:24
BUBBLE#2:24
BUBBLE#3:24
BUBBLE#4:0
RAM TEST : PASS
LOAD BLD : END
SYS NAME : M913C63822.....
LOAD SYS : END
RAM TEST (A) : PASS
LOAD SYS (A) : END
SYS NAME : PC001 *10
RAM TEST (G) : ERROR
display stay hold, it's HANG.
How to troubleshooting I don't have any manual , what board is defective?