HP Pro Mini 260 G9 Desktop PC Maintenance and Service Guide - Page 56

Computer will not start, Power light blinks red three times and then white two times

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Cause Cables of new external device are loose or power cables are unplugged. Power switch of new external device is not turned on. 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. Solution Be sure that all cables are properly and securely connected and that pins in the cable or connector are not bent down. Turn off the computer, turn on the external device, and then turn on the computer to integrate the device with the computer system. 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. Computer will not start Use this information to troubleshoot the computer. Cause Wrong memory modules were used in the upgrade, or memory modules were installed in the wrong location. 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. Power light blinks red three times and then white two times Use this information to troubleshoot the computer. Cause Memory is installed incorrectly or is bad. 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. Computer will not start 49

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Solution
Cause
Be sure that all cables are properly and securely connected and that pins in
the cable or connector are not bent down.
Cables of new external device are loose or power
cables are unplugged.
Turn off the computer, turn on the external device, and then turn on the
computer to integrate the device with the computer system.
Power switch of new external device is not
turned on.
Reboot the computer and follow the instructions for accepting the changes.
When the system advised you of changes to the
configuration, you did not accept them.
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.
A plug and play board might not automatically
configure when added if the default
configuration conflicts with other devices.
Run the Computer Setup utility and ensure that
Device available
is selected
for appropriate USB ports under
Advanced
>
Port Options
.
USB ports on the computer are disabled in
Computer Setup.
Computer will not start
Use this information to troubleshoot the computer.
Solution
Cause
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.
Wrong memory modules were used in the
upgrade, or memory modules were installed in
the wrong location.
Power light blinks red three times and then white two times
Use this information to troubleshoot the computer.
Solution
Cause
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.
Memory is installed incorrectly or is bad.
Computer will not start
49