Restoration just requires logic for the most part. before switching on a game that's sat somewhere for 30 years, start with power. Is the machine getting 240v (

Restoration just requires logic for the most part. before switching on a game that's sat somewhere for 30 years, start with power. Is the machine getting 240v (or 120 depending where you are). Then check the transformer/power brick - is it doing its job converting 240v AC to DC voltages. Measure those. Is the monitor getting power and working. Then you can plug in your PCB (assuming it's not corroded to hell). Then go from there. There's so much info out on the web these days, someone has usually documented most problems you're likely to come across.