robo tech wrote:
In copier work, this occurs sometimes. It's usually a cracked trace on the
board, that when pressed or thermally expanded, it drops out. It can also
happen when the board moves a bit, and touches a little of the metal frame,
causing it to ground out. I hope that you find the problem without too much
grief.
73's
Tim
KK5H

Hi Tim,

thanks for the info, that seems quite possible, but it's difficult to find
because it's difficult to see.

Matthias HB9EGM