Fischer Panda iControl2 panel inop

[VIPJets]

Hello, fellow sailors. Our Fischer panda 10000i IControl2 panel does not turn on when we push the power button. Prior to this, it was working fine. We just changed the water pump belt and had disconnected the positive terminal from the starter motor, as shown in a few Fischer Panda YouTube videos and reconnected that same red terminal. Positive terminal as before. However, when we push the. Upper left power button on the iControl 2 panel, the display does not turn on. We have checked the 30A starter fuse on the generator itself and all is in order. Any suggestions would be most appreciated. Thank you.