Response from Jonathan: Adam,

First off, we’re glad you find our content helpful. Please stay tuned for more posts, videos and podcasts in the future.

As for your question, it looks like your blue drive is up too high. While this could be caused by some bad capacitors, this looks more like an issue with some bad parts on your neck board. A bad blue drive transistor (could be open causing too much blue) or a malfunctioning blue drive potentiometer could both be causing this issue. Definitely want to check out these parts on your neck board. Check out our post on Checking A Monitor Tube for more information.

On the power supply wiring, it looks like the ATX-style power supply that’s attached to the cabinet must have gone bad and they didn’t have another one around so they used a standard switching power supply instead. Basically they cut the DC wires coming out of the ATX-style power supply and matched them up to the appropriate locations on the switching power supply. You’ve got to remember that an operator’s goal is for the game to make money and if it’s down it’s not making money. In cases such as this, sometimes operators they will do hacks (such as this) to get the game up. You should be able to remove the ATX-style power supply from the cabinet provided that it’s not supplying AC power to the switching power supply. That being said, they probably left it in there so they wouldn’t have a big hole in the back of the cabinet. If you’re going for a full restoration, it might be a good idea to get a new ATX-style power supply and remove the switching power supply just for a nice, clean look in your cabinet. Of course, a working game is a working game so the decision is yours.

Hope that helps. Thank you for your questions and good luck with your repair. BTW, $50 is an amazing price for this arcade cabinet! You got a great deal, my friend.