Epson EL 486UC - Manual (Page 105)

You installed of removed system components, and now
your computer does not start.
Check to make sure you have reconnected all the internal and
external cables correctly.
You may have installed option cards that exceed the system’s
power requirements. Check the power requirements in
Appendix A.
If you replace the microprocessor, make sure the processor chip
and the oscillators are both installed correctly. Also make sure
pin 1 on the chip or the oscillator is connected with pin 1 on the
system board. See Chapter 3.
The Computer Does Not Respond
The computer locks up.
Wait a few moments; if your computer does not respond after a
reasonable length of time, press Ctrl Alt Del. If that doesn’t
work, press the
RESET
button.
You may have installed memory using SIMMs that work at
the
wrong speed. Install the correct SIMMs (see Chapter 3).
You reset the computer, but if still does not respond.
Try turning the computer off, wait 20 seconds, and turn it on
again.
Your computer suddenly stops operating.
You may have overloaded the power supply limitations. See
your option card manual(s) for the power requirements for
your option card(s). Then check Appendix A to see if you have
exceeded the option slot power limits.
6-4 Troubleshooting