Caution!

Before disconnecting any peripheral cables from the system, turn off the system and any external peripheral devices. Failure to do so can cause permanent damage to the system and/or the peripheral devices.

More Problem-solving Procedures

This section provides a more detailed approach to identifying a problem and locating its source.

Preparing the System for Diagnostic Testing

If the checks described in the preceding pages do not correct the problem, you may need to run some diagnostics programs. Most diagnostics programs require rebooting or the closure of all running software.

To Run Diagnostics

1.Turn off the system and all external peripheral devices. Disconnect all of them from the system, except the keyboard and video monitor.

2.Make sure the system power cords are plugged into a properly grounded AC outlet.

3.Make sure your video display monitor and keyboard are correctly connected to the system. Turn on the video monitor. Set its brightness and contrast controls to at least two-thirds of their maximum ranges (see the documentation supplied with your video display monitor).

4.If the operating system normally loads from the hard disk drive, make sure there is no diskette in drive A. Otherwise, place a diskette containing the operating system files in drive A.

5.Turn on the system. If the power LED does not light, see “Power Light Does Not Light” on page 164.

162 Maintaining and Troubleshooting the Gateway ALR 9200 Server