Enter DP67BG to search for the proper page
Click on Documentation
Click on Documentation and Manuals
Download and print DP67BG_Perftuningguide01.pdf
This is a link to the Intel Performance Tuning Guide. Download and print it. Go to page 11 sec. 3.4 and start from there.
And by the way you hijacked my avatar please change it. JZ
Try installing some old regular PCI video card. Install it to PCI slot (not PCI-E!) and you good to go. Boot with it - you should be able to see signal on you monitor and change settings in BIOS, boot to windows and download BIOS 2040 version - it is stable and with has no problems with overclocking and video signals.
Use instructions and flash you BIOS back to 2040 version using F7 procedure.
during this process - leave only one memory module installed (in case you have several).
I know this is relatively old... but just in case someone happens upon it with the same issue: These Intel DP67BG motherboards have a button in the back that is called BACK2BIOS... if you mess up tuning and get a BSOD or some other error like a reboot loop, just push the button in (its the white square one on the back above the USB ports) and reboot. The LED will be red and will take you straight back to bios. Its kinda like finding the jumpers on the motherboard but they made a convenient button. Discovered this after doing the same thing you did with the auto tuning. Now i just manual tune. Use that button very frequently trying to find the limits. I call it the OHH SH** button haha. Once you fix the config in bios, or reset defaults if you dont know what is messing it up, then save and exit. Disable the button in the back (Back2Bios) and then restart. Should boot up fine. If you dont have a back to bios button, then there will be jumpers on the motherboard, usually, that you can change to have the same effect. Makes sure in the performance menu in bios that you enable the "Watchdog" as well.