Goodmorning everyone!

Got a 751 down with C-6708.The machines boot normally but when it gets to the point of the lamp homing movement
the lamp starts flickering 3-4 times and it pops c-6708.Sometimes the machines starts normally(you can copy)but after some copies
it does the same thing.

Firmware has been reflashed.
Exposure Lamp has been changed with its wires.
Inverter board has been changed.
Scanner drive board has been changed.

Any suggestions?