Hi Sylvia, We upgraded the BIOS to one sent to us by Intel in which they had purposely re-instated the ability to set a hard drive pre-delay. I can't recall the actuall BIOS version, but the Intel CaseID is 8000760780 starting in August 2013. I did find the link to the BIOS that we were sent to try. It appears to be MC5047.
If you can lookup the Case, you will find that we replaced the mainboard and the issue still wasn't resolved, so it is unlikely that there was a fault with that particular board, and as somebody else posted on the same thread back then that they had 4 DH87MC boards with similar problems, there must be something else causing the issue. As the problem isn't consistent, i.e. sometimes you can disconnect the power overnight and the system boots just fine, then it is very difficult to troubleshoot. As the customer now has the system, and he uses it every day for his business, it is pretty well impossible for us to do further troubleshooting.
However, we'd love for you to do some more testing with regards to the 4 x DB75EN boards that we have that have Cold Boot issues. Again it is intermittent, but every now and then after lengthy power off to mainboard, the system fails to start normally. They are stock standard builds with no graphics card etc, just WD Black Caviar drive, DVD burner, 4Gb RAM (we've tried both 1333 and 1600), Pentium G2130, usb keyboard and mouse. After lengthy power off, when you turn on the display stays black. We were pressing 'reset' after about 30secs and the system would boot to windows just fine, however we found by looking throught the forums that somebody else found by accident that if you walk away from the system for 5 or 10 minutes, the system eventually POSTS and starts. We tried that and noticed that if you leave the computer, after about 5 minutes the Windows start screen suddenly apprears and Windows comes to the desktop. There is no POST display at all and prior to Windows start logo, there is no hard drive activity - nothing to suggest that the system has even POSTED. I've turned on the POST sound now, and will try again to see if the system is POSTING straight away, or after 5 minutes. The Intel case for this issue is 8000841654. We've tried different power supplies, upgrading BIOS etc. all to no avail.
We still have to test hooking up both a DVI and VGA display together to see if anything changes, but as the systems only sometimes don't start, and you have to remove power from the mainboard overnight, it can take days to 'catch it in the act' so to speak. I'm not hopeful however that having 2 displays running will actually show us anything as the system doesn't seem to POST for a good 5 minutes.
Thanks in advance for any assistance you may be able to offer.