Sadly it is no longer under warranty. I'll give a whack at the other fuses before I try anything else, we did recently have a big power outage that could possibly have triggered something and one of the kids may have had it on at the time.

I'd considered the 990 but that still doesn't get the the HDMI switching I need and doesn't get around the PS3 (my trusty BR source) not being able to transmit lossless audio except by HDMI.