Powering From Bench (Sega Mega-Tech)

the sega mega tech is powered from the pin headers at the top right it has two main rails a 12v rail for the sound output, and a 5v rail for the rest of the system for most testing/diagnostics you can simply power the board from a bench supply on the 5v rail a working board pulls around 1 6a to 2a at 5v 5v current above this usually means a short or failed components common ones to pull huge current are the io expanders (cxd1095) once 5v is applied you should see red light on the bottom left of board