Have a project 6M$M trying to bring back to life.
Problem unable to get into test mode, unable to start game.
Pin boots up correctly 7 flashes on alltek MPU
New rectifier board with correct voltages
Alltek MPU with correct voltages
All 0.1 connectors have been repinned
Displays work.
After it boots I get a single beep tone only
Head is grounded to cabinet.
Known good working driver board
Alltek board setup for free play with correct game settings
All fuses checked
Fuse holder under Playfield has been replaced.

Any thoughs

Coin door is connected and 0.1 connectors have been repinned.
Try another coin with no change

Solved isolated it down to the mpu