Appendix C

Power-on Diagnostics

The built-in memory (ROM) of your computer contains a series of diagnostics programs, which your computer runs automatically every time you turn on the power. These programs check internal devices such as ROM, RAM, the timer, the keyboard controller, and the diskette drives.

When you turn on the power, the computer performs the tests described in this appendix. If it finds an error, it displays a specific error number and error message on the screen.

If the error is serious, the computer cancels further checking and halts system initialization. The error message remains on the screen, and you can no longer operate the computer. If this happens, contact your Customer Care Center as soon as possible. Report both the error message and code number.

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

F1 key to resume

Write down the error message and code number, and then press F1 to resume. Report the error message and code number to your Customer Care Center when requesting repairs.

System Device Check

The computer first checks its internal devices, such as ROM. If it finds a malfunction, it displays an error message. In some cases, the computer may halt with no further information.

Power-on Diagnostics C-1