get yourself a beep speaker and learn how to use it.
HA, yeah no kidding. I had an Abit mobo with a post code display that saved my hair from being ripped out a couple times.
I'm assuming you already tried clearing the CMOS?
You could also try the: unplug PSU AC cable, press power button, plug PSU AC cable back in, press power button again trick. I've seen that fix all kinds of funky problems.
Main: i5-3570K, ASRock Z77 Pro4-M, MSI RX480 8G, 500GB Crucial BX100, 2 TB Samsung EcoGreen F4, 16GB 1600MHz G.Skill @1.25V, EVGA 550-G2, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Seagate SSHD, 8GB 1866MHz G.Skill, Crosley D-25 Case Mod