Plug something into the service outlet to see if you have power that far. If not check that the outlet the machine is plugged into works, and the power cord into the back of the game is in tight. Then check main fuse, and remove metal cover ( with the game unplugged ) over the on/off switch and see if everything is okay in there.
If all good. Then check the metal cover of the box covering all the boards and see if it has a label that says reset switch inside. If so turn gamne on, dig around and find the reset switch buried in there, hit it once. No label ? Then likely no switch, then short pins 6 and 8 briefly on JFP1 on the motherboard to simulate pushing the on button of a PC, and see if it turns on then. ( JFP1 is on the left side front of the motherboard, if you were in front of the game, see picture )
If that doesn't do it, then start checking outputs of atx power supply or power supply board if your game has that.
LTG : )
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