yes it's happend before.
never botherd with one though m8 , useless 99% of the time and the 1% there usually switched off , seems all the ram chips have been blown on 1 , and on the other the mobo is leaking too much power to the system ( probably a resister has fused open ) anyway cut a long story short ,i put some new sticks in the big pc and they lasted 20 minutes so its a deffinate case of new mo-bo and ram , all in will only cost 80 quid but it really did make me think about should i bother or not.
the other pc is polling but its getting stuck on poll event so theres a hardware problem stripped it bareboned , .. ram had gone as well , dont think a surge protector would have saved them seems the static done most of the damage.