I have a HTPC (DELL SFF machine - Windows 7 Ultimate 32 bit edition) and an XFX ATI Radeon 4350 card using the HDMI output to the Denon AVR-1912 amp. After it I have a very old LG plasma (42" - only able to do 1024x768). Most recent Radeon drivers installed, fetched from ATI/AMD. What I get is a black screen, when computer boots normally. What works: * Analouge composite -> TV works fine. * I had a AVR-1612 for a brief time, and with this, it all worked fine with no issues what so ever. * "Safe mode" (800 * 600) is no problems => means that the HDMI connection between the HCTP and the Amp, as well as the HDMI between the Amp and the TV works as expected. * Uninstalling the ATI drivers and running "drive sweep" (Driver Sweeper - Free software downloads and software reviews - CNET Download.com) it also boots fine => Killing ATI drivers and it works fine. Also what DOESN'T work: * Normal booting * Booting in lower resolution Ergo; ATI drivers and the Amp don't communicate properly. Warmly welcome any feedback and all forum posts related to something even close and really old and the only tangible suggestion is to let it boot into the back screen mode and unplug the HDMI and plug it in again. That btw didn't work either.