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The program continues after an error in one of the following ways:

It returns to the DEVICE LIST, or

If you are running multiple tests and are not terminating on an error, the program repeats the test that caused the error.

The remainder of this chapter describes the tests you can run on the system’s internal devices and on the optional devices installed in your com- puter. The program displays the title of each check on the screen.

For a complete list of the error codes and messages that are displayed by these tests, refer to Appendix A.

System Board Check

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

•The 8088 CPU chip

•The system ROM

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

•The main integrated circuits.

The checks made on the 8088 CPU chip are extremely comprehensive. They ensure that the CPU instruction set is functioning correctly.

If an error is reported, write down the error code and message, or print them out, and contact your Epson dealer. Attempting to correct system board errors yourself may violate your warranty agreement.

Memory Check

Use this option to check the computer’s built-in memory. The program checks the DIP switches to determine the amount of main memory. If any settings are incorrect, check the DIP switches to make sure they match the installed memory.

Note: This option does not check expanded memory above the 640KB memory limit imposed by MS-DOS.

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