Panny PZ80 with HTPC on HDMI problem

[Nick1881]

My dad has the 46PZ80 Panasonic plasma and a HTPC hooked up via HDMI which is AMD based with the 780G chipset. Basically if I boot the PC and then switch the input nothing is displayed, last night I got it working by either starting the PC with the TV set to the correct input for it or I may have un-plugged the HDMI and reconnected it. Either way if I start the PC first then switch the TV from the SKY on HDMI 1 to the PC on HDMI 2 it doesn't come up.

Anyone have any ideas?

 

[Nick1881]

Hmmm, I may hook it up to the AV amp as that has HDMI pass through.