Troubleshooting; Basic Troubleshooting - HP EliteBook 745 G2 Maintenance And Service Manual

Test
Boot Block Checksum
DRAM
Serial Port
Timer
RTC CMOS battery
NAND flash device

Troubleshooting

Basic Troubleshooting

If the computer is experiencing operating problems or will not power on, review the following items.
Table 9-1 Power-On Troubleshooting
Issue
The computer unit is experiencing operating
problems.
The computer does not power on.
The computer powers on and displays a splash
screen, but does not connect to the server.
ENWW
Description
Tests boot block code for proper checksum value
Simple write/read pattern test of the first 640k of memory
Tests the serial port using simple port verification test to determine if ports are present
Tests timer interrupt by using polling method
Tests integrity of RTC CMOS battery
Tests for proper NAND flash device ID present
Procedures
Ensure that the following connectors are securely plugged into the computer:
Power connector, keyboard, mouse, network RJ-45 connector, monitor
1. Verify that the power supply is good by installing it on a known working unit
and testing it. If the power supply does not work on the test unit, replace the
power supply.
2. If the unit does not work properly with the replaced power supply, have the
unit serviced.
1. Verify that the network is operating and the network cable is working
properly.
2. Verify that the unit is communicating with the server by having the System
Administrator ping the unit from the server:
● If the computer pings back, then the signal was accepted and the unit is
working. This indicates a configuration issue.
●
If the computer does not ping back and the computer does not connect
to the server, re-image the unit.
Troubleshooting 85