Everything is working great and I've connected it to my Samsung 1080p TV via the HDMI.
I also have a Sony STR-DN1000 that I use to switch between multiple HDMI sources - it outputs video to my TV and processes audio passed over HDMI. I tried connecting the mobo to one of the HDMI inuts on the amp. It works fine except that if I switch sources on the amp, turn off the amp/TV, or do anthing to drop the connection, it won't pick up the connection again if I switch the amp input back to the HTPC input. The only way to pick up the HDMI signal is to have the Amp & TV switched to the right input and reboot the PC.
I'm somewhat perlplexed as to why it's doing this, and I'd like to know if there's a way of fixing it. I plan to keep the PC on most of the time; ideally if I want to view something I don't want to have to reboot first. I've established it's not a Windows thing as it does the same if viewing the BIOS screen via HDMI.
None of my other equipment connected to the Sony amp does this, furthermore if I connect the PC directly to the TV there are no problems with switching inputs either.