Maintenance and Service Guide

Computer will not start.
Cause Solution
panel LEDs and audible codes on page 73 to determine
possible causes for the blinking red and beep codes.
3. If you still cannot resolve the issue, contact Customer
Support.
Power LED ashes Red three times and then white two times.
Cause Solution
Memory is installed incorrectly or is bad. CAUTION: To avoid damage to the DIMMs or the system board,
you must unplug the computer power cord before attempting to
reseat, install, or remove a DIMM module.
1. Reseat DIMMs. Power on the system.
2. Replace DIMMs one at a time to isolate the faulty module.
NOTE: DIMM1 or XMM1 must always be installed. DIMM1
must be installed before DIMM2, and DIMM3 must be installed
before DIMM4
3. Replace third-party memory with HP memory.
4. Replace the system board.
Solving network problems
Some common causes and solutions for network problems are listed in the following table. These guidelines do
not discuss the process of debugging the network cabling.
Table
6-2 Solving network problems
Network driver does not detect network controller.
Cause Solution
Network controller is disabled. 1. Run Computer Setup and enable network controller.
2. Enable the network controller in the operating system using
Device Manager.
Type device manager in the taskbar search box, and then
select Device Manager from the list of applications.
Incorrect network driver. Check the network controller documentation for the correct driver
or obtain the latest driver from the manufacturer’s Web site.
Network status link light never ashes.
NOTE: The network status light is supposed to ash when there is network activity.
Cause Solution
No active network is detected. Check cabling and network equipment for proper connection.
Solving network problems 65