Check your cpu stepping (C0, D0, etc) against your Intel mb's processor compatability list.
Some later cpu's can't start with some early bioses.
PS Best to start with your mb Overview page then go to the processor compatability chart. You can find the S-spec on the Intel cpu box, look up the stepping on the Intel processor gage.
Went to my local Frys this morning and bought another Motherboard (same model DH55HC). Swapped it out and it came up fine. Original MB was in fact DOA.
Try system boot troubleshooting guide available on the Intel website:
If you have followed those steps and the problem remains, contact Intel customer service for warranty replacement.
See a list of available phone numbers here: