Yesterday, when I got home from work, I noticed that my computer would not turn on. The culprit appeared to be my UPS (uninterruptible power supply) unit, which looks very much like the above, and which just emits a sick squeal when the button is pressed. So I called my friend and system consultant Mike Estrin and asked when he could drop by and replace it. Until then, I will probably not write many blog posts. So it goes….