Intel considers this motherboard as a mature product therefore the support we offer is only through our web site:
As an additional detail, you have covered the troubleshooting for this kind of issue reason why we recommend replacing the motherboard. A BIOS recovery test might help:
Try another power supply?
Battery is giving full voltage.
Today I had tested PSU and all its 20 pin connector, its giving perfect voltage with other 4 pin connector. Now its not even booting with removing and refitting fan.