Appendix C

Power-On Diagnostics

The built-in permanent memory in your computer (ROM) contains a series of diagnostics programs. These programs are run automatically by the system every time you turn on the power. The diagnostics programs test the components of your system, such as the ROM, RAM, keyboard controller, timer, video controller, diskette driver, and hard disk controller.

When you turn on the power, the computer performs the tests described in this appendix. If an error is found, an error code and an error message are displayed. If the error is serious, the computer cancels further checking and halts the system. The error message remains on the screen, but the computer is inoperable. Write down the error message and code number and call your Epson dealer.

If the error is not serious, the computer displays an error message and waits for you to resume further checking. You see this prompt:

(Resume = "F1" key)

Write down the error message and code number, and then press F1 to resume. Report the error message and code number to your dealer.

System Device Check

The computer first checks its internal devices, such as the ROM. If a malfunction is found, the computer displays an error message. In some cases, the computer may halt with no further information. If this happens, contact your Epson dealer as soon as possible.

If the computer finds an error on the system board, this message is displayed:

10x-system board error

where x is a number from 1 to 8 that represents the specific circuit

Power-On Diagnostics C-1