I have a Supermax lathe with Fanuc O-T controls and I am getting an alarm that requires powering down and restarting to clear. The alarm message is:

1005 Spindle Alarm

409 Servo Alarm(serial err)

The board has AL-04 on it.

The problem seems to be getting progressively worse, as the alarm is happening more frequently.

If anyone is familiar with this issue I would appreciate any advice you can offer. Thank you.