User`s guide

104
Chapter 4: Solving Problems
Caution: Read help information for a test before running it: the diagnostic package
containsmany optional teststhat shouldbe usedonly bya user withadvanced technical
knowledge. Inadvertent actions could be damaging, such as running a hard drive write
test on a hard disk. All tests that require external hardware, user interaction, or are
destructive, are disabled in the default configurations. Before using such a test, make
sure you read and understand the help information for that test.
Monitoring POST
For detailed information on POST see the section “Power-on Self Test (POST)” in
Chapter 3.
Verifying Proper Operation of Key System Lights
As POST determines the system configuration, it tests for the presence of each mass
storagedevice installed inthe system.As eachdevice is checked,its activitylight should
turn on briefly. Check for the following:
• Does the diskette drive activity light turn on briefly? If not, see “Diskette Drive
Activity Light Does Not Light” on page 108.
• If a second diskette drive is installed, does its activity light turn on briefly? If not,
see “Diskette Drive Activity Light Does Not Light” on page 108.
• If there is a hard disk drive or SCSI devices installed in the system, does the hard
disk drive activity light on the control panel turn on briefly? If not, see “Hard Disk
Drive Activity Light Does Not Light” on page 108.
Confirming Loading of the Operating System
Once the system boots up, the operating system prompt appears on the screen. The
prompt varies according to the operating system. If the operating system prompt does
not appear, see “Initial System Startup” on page 99.