I stumbled upon a baby pac and lo and behold it doesn't work!
I ended up putting an Alltek MPU in it so I could at least get the vidiot working before repairing the MPU. I'm getting good voltages on at the test points on the power supply as well as the test points on the vidiot. The first power up only gave me 4 flashes on the Vidiot. I removed all the roms and verified them in the burner and found U11 was bad. I burned a new one and replaced it. The vidiot would then flash 8 total times.
Looking at the pinrepair guide, it sounded like the TMS9928 was bad. I ordered a new one and replaced it and ended up with 9 flashes. I ended up ordering new video ram which should come in this week. I swapped the video ram around and tested the connections on the sockets and they all appear ok so far.
I'm just curious if I'm counting the number of flashes correctly on the MPU. This is my first attempt at repairing a baby pac so I'm not sure. I just get a bunch of garbage patterns on the screen after it boots. If I press the video test button once it has no effect, but if I press it twice I get a nice color bar test screen.
Pressing the test button inside the coin door cycles thru the light test and solenoid test but nothing happens on the screen.
Can someone that is more experienced with these boards take a look of my video and tell me if I'm missing the 10th flash?
The 2 second pause between the 8th and 9th flash is what seems odd to me.
I'm planning on replacing the connectors this week when I get a chance. I was hoping to get the vidiot to flash 10 times first though so I could see the communications test.