Epson 20 - Manual (Page 27)

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Never turn off or reset your computer while a disk drive light is
on. This can destroy data stored on disk or make a whole disk
unusable.
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Always wait at least five seconds after you switch off the power
before you switch it on again. Turning the power off and on
rapidly can damage the computer’s circuitry.
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Do not leave a beverage on top of or next to your system or any
of its components. Spilled liquid can damage the circuitry of your
components.
Follow these steps to turn on your system:
1. Make sure the power cord is plugged into the power inlet on the
back panel of the computer and into a 3-prong, 120-svolt,
grounded electrical outlet.
2. Turn on the monitor, printer, and any other peripheral devices
connected to the computer. (Always turn on the monitor and
any peripheral devices before you turn on the computer.)
3. Insert the Startup diskette into the diskette drive, as shown
below. When it is in all the way, turn the latch down (clockwise)
to lock the diskette in place.
Setting Up Your System 1-13