The Power/Speed indicator above the keyboard lights up, and after a few seconds the computer begins to perform an internal self test. This is a diagnostic program the computer runs whenever you turn it on. The power-on self test checks the RAM (random access memory), keyboard, system board, and peripherals before the computer begins normal operation.

For a complete description of the power-on diagnostics, see Appendix C.

Adjusting Screen Contrast and Brightness

If you cannot see text on the screen clearly, use the switches on the right side of the screen to adjust the screen’s contrast and brightness. The switches are shown below:

The contrast switch determines how bright the characters appear against the background. To increase the contrast, move the switch up. To decrease it, move the switch down.

To make the backlighting brighter, move the brightness switch up. To decrease the backlighting, move the switch down. To conserve the battery’s charge when you’re running the computer on the battery, do not make the screen brighter than necessary to read the text clearly.

Setting Up Your System

1-17