My mouse trap didn't work. Sigh!

Oh, well. We will see.
Had a rather tiring, yet not very productive day today. Was trying to see why some data was incorrect.
Meanwhile, my monitor has been having a problem. It would seem to go off for a second then come back on. The same happened to my LCD monitor, only that it just went off for good. So I have been using a HUGE CRT (19"?)
I changed the cable, changed the power source - from an adapter, to the wall, to the UPS - to no avail. Then I left the PC and started using my colleague's PC.
Later, we switched monitors and his worked on my PC! So apparently the problem was the monitor, not the power.