Being that i'm a conservative libertarion according to political compass.com I have to argue with The_Dude
...joking aside
Your problem is pretty unique, I haven't heard it in a while. I think though the issue is probably in your power supply shorting out.
Next time it happens, physically unplug the power cord wait about 30 seconds and plug it in and try it on.
It could be one of the coils in the power supply is dying.