Computer Will Not Start; Three Red Blinks Then Two White Blinks; Solving Network Problems - HP Z2 Mini G9 Maintenance And Service Manual

When the system advised you of changes to
the configuration, you did not accept them.
A plug and play board might not automatically
configure when added if the default
configuration conflicts with other devices.
USB ports on the computer are disabled in
Computer Setup.

Computer will not start

Use this information to troubleshoot the computer.
Cause
Incorrect memory modules were used in the
upgrade, or memory modules were installed in
the wrong location.

Three red blinks then two white blinks

Power light blinks red three times and then white two times.
Cause
Memory is installed incorrectly or is bad.

Solving network problems

Some common causes and solutions for network problems are listed in these tables. The guidelines do
not discuss the process of debugging the network cabling.
Reboot the computer and follow the instructions for accepting the
changes.
Use Windows Device Manager to clear the automatic settings for the
board, and choose a basic configuration that does not cause a resource
conflict. You can also use Computer Setup to reconfigure or disable
devices to resolve the resource conflict.
To access Device Manager in Windows, type device manager in the
taskbar search box, and then select Device Manager from the list of
applications.
Run the Computer Setup utility and ensure that Device available is
selected for appropriate USB ports under Advanced > Port Options.
Solution
1. Review the documentation that came with the system to determine
if you are using the correct memory modules and to verify the
proper installation.
NOTE: DIMM1 or XMM1 must always be installed. DIMM1 must be
installed before DIMM3.
2. Observe the beeps and lights on the front of the computer. Beeps
and blinking lights are codes for specific problems.
3. If you still cannot resolve the issue, contact Customer Support.
Solution
IMPORTANT: 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. Turn 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 DIMM3.
3. Replace third-party memory with HP memory.
4. Replace the system board.
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