Leenia - There's a big difference between needing a new On/Off switch and a new power supply although the symptoms are very similar. The one merely requires a simple switch, even a wall/mains switch, although it would be inconvenient to mount in the back of your computer. A defective power supply although easily replaces begs the question of a new computer.

Noddy - One of the greatest questions I've even read about misbehaving computers came up in a questions and answer columns many years ago - Back when Commodore was still a competitor.

Q. How do I know whan my computer has had it?

A. Smoke coming from the computer ventilation slots is a pretty good indication. You see, every computer chip has a small ammount of smoke built into it in order for it to operate, and if this smoke ever gets out the computer will never work again.

Dave