I recommend you taking the board outside of the chassis and place it in a non-conducted surface like wood or glass and then clear the CMOS by removing all devices from the system and disconnecting the battery for about 20-30 minutes.
Once this process has been done, you may reconnect the minimum configuration ( 1 Stick of RAM Memory, 1 HDD, no ODD, no Video card) and turn the system on.
I think that the issue you have may be caused by grounding since you were cleaning up the system and after that was not working. Let me know!
Hey Kevin, Wish you a HAppY New YEAR
Appreciate for the quick reply, well I tried your way, but no luck.
After following your instructions and while switched on I recorded the video and uploaded, please find the link (DP67BG 5A error with no display - YouTube)
Hope this video will give you more idea on what I am stuck with.
Thanks and happy new year for you too. I am sorry for the delay on coming back to you.
The video you posted is very helpful and it seems that the problem is a video problem. Here you can check the Beep codes on Intel Boards:
At this point my recommendation is to change the battery for a new one just to make sure it is not causing the problem and if issue persists, test a different processor if possible.
In the case that testing a different CPU is not a viable option, I recommend you contacting your local support for a possible replacement of the unit.