First posting - not sure to the rules Of the forum but adding to this topic since it may be related.
I just pushed to 3 my pinball collection by buying a Tri-zone, a system 6 machine. It does not boot up. I have 2 LEDs on constant with play field on. No display lights although from an angle I can see there is power going to them.
When I first fired it up, I had some numbers going to the displays that eventually went away.
My question this: I have checked the voltages and I am only getting 9 Volts DC in the 12V unregulated supply, both on the MPU board and on the power board. The 5V is good. The F5 fuse and the C15 capacitor all have 9 V going to them.
Any ideas on what could be limiting the voltage from reaching the 12V dc?