I've got the exact same problem and haven't been able to find a solution.
Does anyone know what to do?
Hey guys - I just bought a samsung P2370 and plugged it into the DVI port on my Radeon HD5770 - alas - no picture, just the grey box alternating the text analogue and digital in the top left corner.
Plugged my old monitor into the DVI cable to check it - working fine - downloaded samsungs drivers for windows 7 and installed them.....plugged in the samsung and rebooted - no joy here either - checked the monitor on my other pc - works perfectly, so not a faulty monitor - plugged my old monitor into the VGA connection of my radeon, and the samsung into the DVI and booted into windows - old monitor works fine, still no image on samsung - checked the monitors in display settings of windows - it shows the samsung monitor as the second display device, and even recommends the resolution of 1920x1080 - I've tried adjusting the resolutin down, and it is set to 60hz, but i still get no image on the samsung - I have checked, and I appear to have the latest ati drivers for my GPU - any ideas??????
AMD Phenom? 8850 X3 Triple Core 2500MHz CPU
Gigabyte GA-M68M-S2 motherboard
4GB DDR 2 RAM
Asus ATI Radeon HD 5770 CuCore PCI-E Graphics Card
Samsung P2370 DVI connection