Machine: Rebuild K40
Problem/ Question: my k40 with Laserboard has worked realy well for Month now,
But suddenly the potensiometer goes down to zero and back up to 13-14 again and down to zero again ,and its not fire any Moore , if ii wait a couple of minutes again , it starts too work for a While again , but after some minutes it starts too do the same things again and not fire any moore .
If i push the test button on top it fires ok .
Can it bee PSU or the tube that starts too going bad ?