The remainder of this appendix describes the tests you can run on the system’s internal devices and on the optional devices installed on your computer. The program displays the title of each check on the screen.

For a complete list of the error codes and messages these tests may display, see the table at the end of this appendix.

System Board Check

Use this option to check the operation of each major component on the system board, including:

LI The 80386SX CPU chip

CI The system ROM

Ci The real-time clock, CMOS RAM, and battery

Cl The main integrated circuits.

The checks made on the 80386SX CPU chip are extremely comprehensive and ensure that the CPU instruction set, including protected-mode operation, is functioning correctly.

If an error occurs, make a copy or a printout of the error code and message, and contact your Epson dealer or service center for assistance. Attempting to correct system board errors yourself may violate your warranty agreement.

Performing System Diagnostics C - 9