I have seen numerous posts regarding lack of video or perceived failure to post for the DQ77KB. I am now seeing the exact same thing.
DQ77KB, G550T CPU, two 4GB sticks of DRAM straight off the Intel HCL. Connected to a monitor via an HDMI -> DVI cable. Board fired right up and I got into BIOS. The *only* thing I changed was to turn on a fast boot option (I only saw it once so I don't remember precisely what it was, but there were three settings for making the BIOS boot faster, and I changed one). At that point, I saved changes and rebooted. The board powered up for about six seconds, then powered down (not even long enough for the CPU fan to come to a complete stop) and then fired back up again. No video. This is now the behavior of the board 100% of the time -- power up, board comes up for 5-6 seconds, powers itself down, powers itself back up, and runs (presumably) -- no video. I have tried each SODIMM by itself, and together (as it had originally worked once upon a time). No luck. I tried two different monitors, no luck. In fact, the blue LED on the board blinks once when the board first powers up -- and if I wait a bit and then press "ctrl-alt-del" the light blinks again -- exactly at the same moment, as though I am rebooting the board but simply can't see it. So I think the board is actually up and working, however there is no video.
I tried using the jumper to clear/reset BIOS. I removed the CMOS battery for an hour, unplugged the board from power. Nothing is working. Yet I think the board is actually coming up, there is simply no video. When I plug earphones into the green jack, I get a single high pitched beep when the board comes up.
How can I correct this? Perhaps the one single BIOS change I made has totally FUBAR'd this board?! I would have thought that the things I have done to this point would have reset the BIOS to defaults.
I have seen, as I said, numerous posts about this board and similar issues, with little to no information from support as far as what the problem could be, yet it seems widespread. I have contacted my vendor to see if I can do an RMA, but it troubles me that the board appears to respond to the keyboard, yet simply won't display video.
Any advice most welcome.