OK. ALL boards have been removed, pads cleaned and ALL connector pins reflowed completely.
I am beginning to think perhaps the PSU is causing these issues....I've checked the PSU with the following voltages recorded:
- - 12vDC is reading -14.68vDC
- +12vDC is reading 11.51vDC
- +5vDC is reading 4.97vDC
- (On CPU board)
- +5vDC is reading 4.9vDC
I have no idea whether the unbalanced DC can cause these issues. Game is functioning 100% however will need to be cleaned up...