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HP Recommended
HP
Microsoft Windows 10 (64-bit)

how to fix 929-Fatal MCA error. HA detected CPU 0 DIMM Slot 5 or 6

1 REPLY 1
HP Recommended

@santhosh1156,

 

Welcome to our HP User Forum!

 

A "929-Fatal MCA error" typically refers to a Machine Check Architecture (MCA) error in HP systems. The error message you provided indicates that the Hardware Alert (HA) feature has detected a problem with the CPU 0 and DIMM (Memory) Slot 5 or 6. This error usually points to a hardware issue, possibly with the CPU or memory module.

 

Here are some steps you can take to troubleshoot and potentially fix the issue:

 

  1. Reseat DIMMs: First, try reseating the memory modules (DIMMs) in slots 5 and 6. Make sure they are properly inserted and locked into place. Reseating the memory can sometimes resolve poor connections causing the error.

  2. Check for Bent Pins: If you are comfortable with hardware troubleshooting, inspect the CPU socket for any bent pins. A bent pin can cause connectivity issues and result in MCA errors.

  3. Test with Individual DIMMs: If you have multiple DIMMs installed, test each DIMM individually. This will help identify if a specific DIMM is causing the issue. If a particular DIMM consistently triggers the error, it might be faulty and needs replacement.

  4. Update Firmware/BIOS: Check if there are any firmware or BIOS updates available for your system. Sometimes, updates address compatibility issues and can help resolve hardware-related errors.

  5. Check for Overheating: Overheating can sometimes cause MCA errors. Ensure that the CPU and other components are not overheating. Clean any dust from the fans and heat sinks, and ensure proper airflow.

  6. Run Diagnostic Tests: Most HP systems have built-in diagnostic tools. Access these tools during boot by pressing a specific key (usually F2 or F12). Running diagnostics can help identify the root cause of the hardware issue.

  7. Contact HP Support: If none of the above steps resolve the issue, it's recommended to contact HP customer support or visit an authorized HP service center. They can provide specific guidance based on the error and assist with further troubleshooting or repairs.

Remember that dealing with hardware issues requires careful handling to avoid causing further damage. If you're not comfortable with hardware troubleshooting, it's best to seek professional help to avoid any unintended complications.

 

Kind Regards,

 

NonSequitur777


† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.