Battlezone problem.

 Help!

 My battlezone was working fine, until one day I turned it on and the
vectors were being drawn in wacky places. It seemed to lack Y deflection
(most of it, anyway,) and there was lots of jitter...
 someone suggested that I reseat the chips, clean the sockets, etc... and
this didn't fix it.

 Now I get zilch from the unit. I didn't see squat on the data lines, and
I heard a "blip-blip-blip-blip..." from the speaker... the sound of a
reset. So I probed the reset circuit output, sure enough.. it's
going up and down about two or three times a second. If I press the reset
switch on the generator board it pins the thing in reset, but when I
release it goes back to the resetting...

 How does this watchdog circuit work, and has anyone seen this before?
What trips the watchdog?

                                                Mitch
Received on Tue Jan 13 15:03:19 1998