HP Z840 Maintenance and Service Guide - Page 106
CPU X DIMM Y, Fatal Misc. Error
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Screen message Probable cause Recommended action 2. Reseat or replace the missing mechanism cable. 922-Front USB 2 Not Connected Front USB 2 mechanism is missing or is not connected. 1. Replace or reconnect the missing Front USB 2 mechanism to the system board. 2. Reseat or replace the missing mechanism cable. 923-Fatal IRPP error. Potential system problem; contact HP Support. 924-Fatal IIO error Potential system problem; contact HP Support. 925-Fatal Misc. Error A fatal miscellaneous chipset error is setected. 927-Fatal error on DIMM in slot CPU X DIMM Y Fatal multibit ECC error detected on the DIMM in the slot labeled DIMM Y (where Y is a number), as labeled on the system board. Replace the DIMM in the identified slot. 928-Fatal error occurred in the Fatal error occurred in the designated designated slot. slot. Move the card to a different slot. If the problem persists, replace the card. 929-Fatal MCA Errorr An MCA condition is detected on the system. 939-Front USB 3.0 Not Connected Front USB 3.0 mechanism is missing or is 1. not connected. 2. Replace or reconnect the missing Front USB 3.0 mechanism to the system board. Reseat or replace the missing mechanism cable. 940-Front 1394 Not Connected Front 1394 mechanism is missing or is not connected. 1. Replace or reconnect the missing Front 1394 mechanism to the system board. 2. Reseat or replace the missing mechanism cable. 941-PCIe Device(s) installed in Invalid system configuration. slots 3 or 4 with a single CPU 1. Move the PCIe device from PCIe slots 3 and/or 4 to other PCIe slots. 2. Add a second processor using appropriate HP accessory kit. 942-Memory Train Error A DIMM or DIMMs did not train correctly. 1801-Microcode Update Error Unknown or unsupported processor stepping. The microcode update failed. If the processor stepping is supported, contact HP Support. 1802-Processor Not Supported The system board does not support the Replace the processor with a compatible one. processor. 96 Chapter 4 Diagnostics and troubleshooting