This just happened today after years with no issues.
My amp (7700) didn't power on when starting my system. I use the remote trigger from my Marantz 7005 to the amp for auto start. It shows the red light on the amp power button but won't turn blue after my system powers up (this usually takes 30 seconds or so). I tried manually starting it, no joy. I turned off the amp and removed the remote trigger cable then tried switching it on manually but still nothing. If I hold down the power button I can hear it click but nothing else happens. I've unplugged then tried all again, still nothing.
Any suggestions or is it dead?
Thanks in advance.

Best thing to do is go to Outlaw's website and open a service ticket and see what they suggest.