Epson 4SLC2-50 - Manual (Page 101)

Numeric coprocessor problems
CMOS battery problems.
If the suggestions here do not solve the problem, perform the steps
below to identify your system and make a note of any error
messages your computer displays. Then contact your Authorized
Epson Servicer or call the Epson Connection at 1-800-922-8911.
Identifying Your System
When you request technical assistance, be ready to provide the
serial number of your computer, its ROM BIOS version number, its
configuration (including the types of disk drives and options), and
the names and version numbers of any software programs you are
using.
You can find the serial number on the underside of the computer.
If you are able to use your computer, follow these steps to obtain
information about your configuration, as well as the version
numbers of your system BIOS and MS-DOS:
1.
2.
3.
4.
Turn on your computer or press Ctrl Alt Delete to restart it.
As the computer performs its power-on diagnostics, it displays
the version number of your system BIOS as part of the
copyright information. Write down the number.
Write down any information about your setup shown on the
configuration screen that may help in identifying the problem.
After the MS-DOS prompt appears, type VER and press Enter
to display the MS-DOS version number. Write it down.
A-2 Troubleshooting