Do you have AC power on the AC input terminals? Sounds like you have DC on the DC input terminals.
What do you mean by "and is keeping the 50 AMP electric from powering up the Coach"? Do you mean that you have no AC power on the 2 output circuits but AC power to the rest of the coach?
Have you checked everything in the manual related to over temperature?
Your description sounds like an internal fault. Mine recently failed with both boards bad. $900 to repair with 90 day warranty and $1100 for a new one with a 2 year warranty - you know my choice. :S