My HP desk top won't turn on at my house, but it works fine at a friends. We had a storm, the power flickered, so we turned it off and disconnected all cords. After the storm the commputer would not turn on. All outlets are working. Brought it to a friends and it booted up just fine. Wonder if the house is getting bad voltage or amps that the computer knows will cause a problem?
Once in a while we do hear from someone who has problems with electrical power in their homes. The typical suggestion is to try a different wall outlet (mains) in a different room or on a different circuit.