Royal 660 issues

[Crichardson]

I have a Royal 660. Whenever I plug it in the compressor kicks on no problem. That is all though, the display, coin mech, bill acceptor, light, pretty much everything else doesn’t power on. Where should I start to troubleshoot this issue. Hopefully something simple like a loose wire or unplugged wire. Everything is plugged into the control board. If you need pictures let me know I’ll try to get some. 

[allen watson]

Unplug the door switch wires and jumper them together. It’s a start

Follow the wires from the wall to the door. There may be something unplugged. 
I just had this issue and it was the connector to the board AND a bad door switch. 

Edited May 16, 2022 by allen watson

[lacanteen]

Makes no sense. The board runs the cooling system too. If the cooling deck comes on immediately on power up with the door open, either the relay is bad (likely), or you have some creative wiring controlling it (also likely if you purchased used). Start there, then check the control board fuse once the refrigeration system is isolated.