Desktop Board DH87RL, I connect the board the to the power supply but I forgot to connect the 2x12 connector , the board don't start and only the led R Enhanced Standby Led was on, than I verify my error and, after I have disconnect the power, I reconnected all the connectors (2x12 and 2x2), now the led R is on, but the P PWR FAUL LED is on also and only a normal beep is emitted.
You could try removing the RAM and see if the board beeps three times. This will let you know if the board and processor are communicating each other.
I recommend checking the following link for tips about this issue:
http://www.intel.com/support/motherboards/desktop/sb/CS-010254.htm Desktop Boards — Troubleshooting System No Boot Issues
If you still have same problem, I recommend contacting Intel Customer Support for warranty options:
http://www.intel.com/p/en_US/support/contactsupport Contact Support