What is POST-FAILURE?
POST failure ranks as a critical-severity hardware BIOS/UEFI issue in our database. Power-On Self Test failed. The PC will not pass the check and will not boot. This usually traces back to defective RAM, defective CPU, disconnected GPU and faulty PSU. Work through the steps below in order.
Common Causes
- Defective RAM
- Defective CPU
- Disconnected GPU
- Faulty PSU
Step-by-Step Fix Guide
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1
Remove unnecessary components
In our testing, Remove unnecessary components alone clears up POST-FAILURE more often than any other single step.
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2
Reset CMOS
Repeat occurrences typically trace back to less obvious bios instability factors, addressed in the steps ahead.
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3
Check the connection
Try "Check the connection" next if the issue persists — it addresses a secondary cause.
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4
Test POST speaker codes
For lingering POST-FAILURE cases, "Test POST speaker codes" is worth running through.
Commands & Diagnostics
No specific commands required for this error. Follow the step-by-step guide above.
Frequently Asked Questions
POST-FAILURE is most often triggered by defective RAM. Other reports point to defective CPU, disconnected GPU and faulty PSU as contributing factors.
The fastest fix is "Remove unnecessary components". Only move on to the later steps if POST-FAILURE keeps coming back.
POST-FAILURE is rated critical severity in our database. It's worth acting on quickly rather than letting it recur.
Usually. POST-FAILURE is fixable with the steps above; a full Windows reinstall is rarely necessary unless everything else has failed.
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