I had power supply trouble in the past because of buying cheap, Chinese ones. As there was no monitor output, I thought that although the main power was working to the motherboard maybe something was up there.
I went to my computer shop, brought back a power supply, and put it in. Still nothing.
At least I can check my mail on the notebook. Combined with the other events at present, all's so out whack that I could either scream or cry.