The remainder of this chapter 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 chapter.

System Board Check

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

The 80386 CPU chipThe system ROMThe real-time clock, CMOS RAM, and batteryThe main integrated circuits.

The checks made on the 80386 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.

Memory Check

Use this option to check the memory installed in your computer, including expansion memory. The program reads the CMOS RAM to find the total amount of memory. If any settings are incorrect, use Setup to define the correct amount in CMOS RAM. If you installed an optional memory card, you may need to adjust some DIP switch settings on the card.

Performing System Diagnostics

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