Epson Epson - Manual (Page 150)

You reset the computer, but its still does not respond.
Try turning the computer off, wait 20 seconds, and turn it on
again.
Your system suddenly stops operating.
You may have overloaded the power supply. See your option
card manuals for the power requirements of your cards. Then
check “Option Slot Power Limits” in Appendix A to see if they
exceed the option slot power limits of your computer.
Keyboard Problems
The screen displays a keyboard error message when you
turn on or reset the computer.
Make sure the keyboard is securely connected to the keyboard
port and not the mouse port. Although these ports look alike,
they cannot be used interchangeably.
The cursor keys on the numeric keypad do not work
properly.
If the Num Lock light in the upper right corner of the keyboard
is lit, press
Num Lock to turn off the function.
Mouse Problems
Your mouse isn‘t working properly.
Make sure the mouse cable is securely connected to the mouse
port and not the keyboard port. See “Connecting a Keyboard or
Mouse” in Chapter 1 for instructions. Also make sure your
mouse ball is clean. If you are using an MS-DOS application,
make sure your mouse drivers are installed correctly.
7-6 Troubleshooting