The last time I had to diagnose one of these (it was something like two long beeps, followed by six short beeps), they weren't in the MOBO's manual (I always keep these!), and googling the manufacturer (rhymes with "Bigger Kite") turned up various different beep combos with different meanings, in broken Chinglish, but not the one in question.
I think it turned out to be a DIMM that wasn't properly seated or something like that, only diagnosed via trial-and-error.
Biting the hand that feeds IT
