Quoted from vbobrusev:
I have issue with my rbion. ...after 5 mins it’s reboots and gi and all lamps start blinking. Check pinwiki, and i checked voltage on resistor and u19 on I/O board in both test points it’s shows me 5.05v, Any ideas what it can be?
Pinwiki suggests "Should the game start randomly resetting, the first course of action is to measure the +5VDC on the I/O Power Driver Board. If the logic voltage is within spec., measure the +5VDC on the CPU / sound board. The +5V test point on the CPU / sound board is located just to the left of the 6809EP CPU chip (U209) on the board. If the voltage drastically differs between the measurement of the I/O Power Driver Board and the CPU / sound board, turn the game off. Remove and reseat connections CN2 on the CPU / sound board and J16 on the I/O power driver board."
So next step is check the +5VDC at the sound board.