UserÆs Guide and Technical UserÆs Guide - HP Carrier Grade Server cc3300

HP cc3300 Carrier Grade Server Product Guide
Solving Problems 125
Preparing the System for Diagnostic Testing
CAUTION
Turn off devices before disconnecting cables: 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.
• Turn off the system and all external peripheral devices. Disconnect all of them from the
system, except the keyboard and video monitor.
• Make sure the system power cord is plugged into a properly grounded AC outlet.
• 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).
• 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.
• Turn on the system. If the power LED does not light, see “Power Light Does Not Light” on
page 126.
Monitoring POST
See Chapter 3.
Verifying Proper Operation of Key System Lights
As POST determines the system configuration, it tests for the presence of each mass storage device
installed in the system. As each device is checked, its activity light 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 127.
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 127.
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 123.
Specific Problems and Corrective Actions
This section provides possible solutions for these specific problems:
• Power light does not light.
• There is no beep or an incorrect beep pattern.
• No characters appear on screen.
• Characters on the screen appear distorted or incorrect.