Compaq dx7400 Service Reference Guide - HP Compaq dx7400 Business PC - Page 179
Table D-13, channel mode to download, decompress, and execute the ME firmware for Out-of-Band OOB
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CAUTION: Power may still be supplied to the DIMMs when the computer is turned off (depending on the Management Engine (ME) settings). 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. 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 8MB of system memory in single channel mode or 16MB of memory in dualchannel mode to download, decompress, and execute the ME firmware for Out-of-Band (OOB), thirdparty data storage, and other management functions. Table D-13 Solving Memory Problems System will not boot or does not function properly after installing additional memory modules. Cause Solution A memory module is not installed in the XMM1 (or DIMM1) socket. Ensure that a memory module is installed in the black XMM1 (or DIMM1) socket on the system board. This socket must be populated with a memory module. Memory module is not the correct type or speed grade for the Replace module with the correct industry-standard device for system or the new memory module is not seated properly. the computer. On some models, ECC and non-ECC memory modules cannot be mixed. Out of memory error. Cause Memory configuration may not be set up correctly. You have run out of memory to run the application. Solution Use the Device Manager to check memory configuration. Check the application documentation to determine the memory requirements. Memory count during POST is wrong. Cause The memory modules may not be installed correctly. Integrated graphics may 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. Cause Solution Too many Terminate and Stay Resident programs (TSRs) are Delete any TSRs that you do not need. installed. You have run out of memory for the application. Check the memory requirements for the application or add more memory to the computer. Solving Memory Problems 169