HP Pro SFF 280 G9 Desktop PC Maintenance and Service Guide - Page 63

Solving memory problems

Page 63 highlights

Solving memory problems If you encounter memory problems, some common causes and solutions are listed in these tables. IMPORTANT: Depending on the Management Engine (ME) settings, power can still be supplied to the DIMMs when the computer is turned off. 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 memory module. For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory. Otherwise, the computer will not boot the operating system. NOTE: The memory count will be affected by configurations with the Management Engine (ME) enabled. The ME uses 8 MB of system memory in single-channel mode or 16 MB of memory in dual-channel mode to download, decompress, and execute the ME firmware for Out-of-Band (OOB), third-party data storage, and other management functions. System will not boot or does not function properly after installing additional memory modules Use this information to troubleshoot the computer. Cause A memory module is not installed in the DIMM1 or XMM1 socket. Memory module is not the correct type or speed grade for the system, or the new memory module is not seated properly. Solution Verify that a memory module is installed in the DIMM1 or XMM1 socket on the system board. This socket must be populated with a memory module. Replace module with the correct industry-standard device for the computer. On some models, ECC and non-ECC memory modules cannot be mixed. Out of memory error Use this information to troubleshoot the computer. Cause You have run out of memory to run the application. Solution Check the application documentation to determine the memory requirements. Memory count during POST is wrong Use this information to troubleshoot the computer. Cause The memory modules might not be installed correctly. Integrated graphics might use system memory. Solution Check that the memory modules have been installed correctly and that proper modules are used. No action required. Insufficient memory error during operation. Use this information to troubleshoot the computer. 56 Chapter 5 Troubleshooting without diagnostics

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Solving memory problems
If you encounter memory problems, some common causes and solutions are listed in these tables.
IMPORTANT:
Depending on the Management Engine (ME) settings, power can still be supplied to the DIMMs
when the computer is turned off. 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 memory module.
For those systems that support ECC memory, HP does not support mixing ECC and non-ECC memory.
Otherwise, the computer will not boot the operating system.
NOTE:
The memory count will be affected by configurations with the Management Engine (ME) enabled.
The ME uses 8 MB of system memory in single-channel mode or 16 MB of memory in dual-channel mode to
download, decompress, and execute the ME firmware for Out-of-Band (OOB), third-party data storage, and
other management functions.
System will not boot or does not function properly after installing additional memory
modules
Use this information to troubleshoot the computer.
Solution
Cause
Verify that a memory module is installed in the DIMM1 or XMM1 socket on the
system board. This socket must be populated with a memory module.
A memory module is not installed in the DIMM1
or XMM1 socket.
Replace module with the correct industry-standard device for the computer.
On some models, ECC and non-ECC memory modules cannot be mixed.
Memory module is not the correct type or speed
grade for the system, or the new memory
module is not seated properly.
Out of memory error
Use this information to troubleshoot the computer.
Solution
Cause
Check the application documentation to determine the memory
requirements.
You have run out of memory to run the
application.
Memory count during POST is wrong
Use this information to troubleshoot the computer.
Solution
Cause
Check that the memory modules have been installed correctly and that
proper modules are used.
The memory modules might not be installed
correctly.
No action required.
Integrated graphics might use system memory.
Insufficient memory error during operation.
Use this information to troubleshoot the computer.
56
Chapter 5
Troubleshooting without diagnostics