Today, I overheard a conversation that had me traveling on the way-back time machine. Apparently in the olden days, a TV was expected to take a few minutes (at least) to warm up! Television sets used to need at least 5 minutes to warm up from what was called a "cold start". A cold start in progress was signaled by the screen lighting up in an odd pattern and and making strange clicking sounds. The old sets used to have what was called a sub-power switch in the rear, this switch was also called the vacation switch.
...[Source: About.com]
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