I got a good deal on a Fire Attack game on the basis that its buttons "don't work properly", thinking that it could just need a contact cleaning. Anyway, its problem is far stranger. The Game A, Game B and Time buttons work flawlessly for their own functions but the 4 directional buttons do nothing at all. In fact, the time button acts as the "top-right" directional button in game.

I took a look at the PCB and everything looks fine. I cleaned up the buttons and the button contacts and they still do nothing. I also have a Turtle Bridge with a similar problem so I would like to know if any LCD game experts here knew of other components that could be causing problems.