TECH: Tempest resetting after level completed

Trying to prep a Tempest to sell (monitor just fixed) and I have a bizzare
problem. First, upon completing a level, the game resets as if it were
coined up (choose a level). Also, 50% of the time, the vectors would wack
out while playing.

Second, the spinner will only work with the CP hanging open.

During one of the self tests I ran, I had an "M" which would indicate a
Mathbox problem. I reflowed the header pins on the ribbon cable to rule out
cold solder joints. This seems to have fixed the wacky vectors, however,
the coin-up reset is still happening as well as the spinner oddity.

Any thoughts?

-Tom