In your post you mention Alarms on the "Control LED" I'm guessing you are
referring to the LED status on your Servo Drive Units (MDSxxx type drives).
If this is the case, each of the unit status A, 2, 8, etc have to do with communication and drive software writing. It may be that your M64
has lost some or all of it's software in the flash memory.
You can download troubleshooting and maintenance manuals/information
from Mitsubishi's website at
www. meau. com look for downloads and from there you can find the
manuals you need.