Good work mate, my Time Machine has decided to stop working, it keeps resetting, most likely acid damage on the CPU, i have taken the CPU board out and treated it with Vinegar and am waiting for it to dry and will re install it to see what happens.
I hope i dont have to start an epic thread like this to resolve my problem 
Ian
Im getting a feel for these boards now and the logic is starting to gel a bit.
My find with these is that they are prone to the same problems that GTB system 1 and 80 is... ground sucks on these!
To get ground, the boards rely in the pads at the back of the mounting screws... get these dirty or a loose board and ground will keep dropping in and out.. this will cause resetting.
Ive soldered a grounding strap to the trace on the CPU... the other end of this has an earth mounting lug on it that goes to grounding strap mount at bottom of header... ive done the same to driver etc... all now go to "true" ground.
Also a resetting MAY be the power failure cct playing up... does the game boot OK? Or does it take a couple of switch ons to get her going?
If so - look at the capacitor C5, diode D3 and resistor R34... this is the delay cct at start up and allows the voltages to settle before CPU boots. One of these components goes out of spec and it will interfere with the 5V logic to CPU.
If game keeps resetting then CPU is booting... with battery corrosion the prime symptom would be lack of CPU running
