Static displayed on HDMI out for 6-7 seconds on boot or wakeup from HD 6570 Cards...
This actually started happening to me after I upgraded from my onboard i3 onboard. I purchased (2) different Radeon Cards: ASUS and MSI (because I thought the 1st one was failing when I saw the problem). Both are HD6570 2GB cards and I am getting static on the screen on windows startup for approximately 6-7 seconds until it is able to display the desktop correctly. It also occurs when the machine is woken up from sleep.
This never occurred when I was using the onboard video (HDMI) from my ASROCK H77M-ITX. At this point I figure I have some setting wrong in windows or ATI control panel but i have no idea what it could be. I have built 100s of these machines before and have never seen this. I have even checked BIOS settings to make sure the onboard video is disabled.
MB: ASROCK H77M-ITX
TV: Panasonic TC-P58V10 58" Plasma TV
HR: ONKYO TX-NR717
VC: ASUS HD 6570/ MSI HD 6570