What electrical problems other than high voltage or surges cause computers and light bulbs to repeatedly blow out?

If you have checked voltage 105v to 130v (this is the average fluctuations 126v is average), and no spikes have been detected, the only thing left is Phase. Your components are designed to work on 60 Hz system. If the c.p.s. (cycles per second or Hertz) is not correct, alot of problems will arise. Y-THINK-Y