Tried the MPU on my friends 8ball today, played one game and the game cut out. Turned machine off then on again same thing happened. The board has been modified by a previous owner with a off the board battery.Pins seem to be OK. The solder on the back of most of the pins seem to be a dark  colour, maybe corrosion but not sure. Hope this helps. Cheers Les. (ps, his 8ball has new alltek MPU so it works fine)