Looking for some advice on troubleshooting a no-boot on my Alltek MPU. I’m getting the initial reset flicker, but no other flashes. 5v is at 4.9, which I feel like is close enough that the program should launch, but it clearly isn’t. All connectors in the game have been re-pinned. I only have J2/3 on the rectifier, J3 on the SDB and J4 on the MPU connected at this point in time. All other voltages seem to be in order, and I’m running out of ideas.
Also, maybe a separate topic, but I noticed some questionable items in the schematics showing wire colors and origins. While confirming I re-pinned all the connectors properly, I can across 2 wires that aren’t listed as connections, and one that seems to be missing, but I can’t pinpoint where they’re coming from/going to.
- The first is the J3 connector, pin 13 on the rectifier. It’s supposed to be a WHT/YL wire that goes to the solenoid bus, but it’s missing.
- The second is the J1 connector on the MPU, pin 8. Notes say it’s reseeved for future use. The wire I have connected is GRY, and I’m unsure where it leads.
- The last is J2 connector on the MPU, pin 2. No notes or info (other than the general info of it being connected to play field strobe) about this being a pin. Right now I have a GRY/YL wire at that location and could use some more info.