So I’m trying to get my 4003EC up and running, but have been running into a consistent amplifier trouble. Amp trouble indicator is solid, and behaves like it is going into an overcurrent protection condition. Been troubleshooting down to the “replace motherboard” section in the manual, wanted to see if any of my experts had any insight to offer. No shorts, polarity correct, voltage jumper set properly, speakers appropriately tapped. Thanks in advance.