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In regard to your inquiry, at this point pretty much you tried all the steps that we recommend, which are the BIOS recovery and to clear CMOS. The BIOS might be corrupted, not sure if you jump from 0016 all the way to 0048, but if you did that, that might be the reason for the issue. Besides trying another monitor or video cable, the next thing to do will be to replace the board if it is under the 3 years Intel warranty:
For phone support, depending on your location, you will see the contact information on the links below:
EMEA contact information: http://intel.ly/28QeAF3
APAC contact information: http://intel.ly/1ITfjUF
LAR contact information: http://intel.ly/29c0rW4
North America: Phone Number 1-916-377-7000, Monday - Friday 7:00 AM to 5:00 PM (Pacific Time).
Any further questions, please let me know.