No. "8" shown on the LED status display -- FANUC Series Oi Mate-MB Controller

[pmanoj]

Hello,

I use FANUC Series Oi Mate-MB Controller for my machining center. I have encountered a problem after powering up. The monitor showed nothing and the keypad did not light up. I looked behind to check the indicator lights (please see attached photos for more details). There were 4 green lights and 1 red light on. The LED status display showed "8". I'm looking for an explanation as to why this happened and how I can troubleshoot this problem.

Big thanks in advance.

Best Regards,
pmanoj

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[jacof]

That fault normally indicate that the main board did not ""Boot"" up.
The only way to rectify is to replace the main board

[pmanoj]

Thank you for your answer, jacof.

[catur4widhi]

ROM/sram card is not seat properly, dont remove the sram card before make back up

[zavateandu]

Alarm 8 indicates that the CPU not started,i would recomend to replace the CPU board not the main board