QSC 2450 Power amplifier

Channel 2 works without problem but, channel 1 doesn't work at all. Not a sound. Only suspicious thing is that the minute you turn the main power switch on the red clip limiter LED for channel 1 volume pot instantly comes on and stays on constantly regardless of where that volume pot is set. I have checked the rear micro switches to make sure that the amp is not bridged and have definitely isolated the problem to channel 1. Does the red clip limiter light coming on and staying on possibly indicate a direct short in the input stage somewhere or do you feel as though this is more likely an indication of say, an open power transistor in the final stage? Any suggestions would be appreciated. I live in the DFW area and would also appreciate a possible local repair reference if possible. Your time is greatly appreciated, Gregg Orange