System Fan (90B) Error

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HP 15s-du0000 Series

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FF King @ffking

Rep: 1

Gepost: 16 aug 2026

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System Fan (90B) Error

(The system has detected that a cooling fan is not operating correctly.

Continued operation of the computer is not recommended by HP and might cause unpredictable behavior that can result in a shutdown, data loss, or computer damage. The computer will shut down in 15 seconds. To prevent the shutdown and continue operation, press the Enter key now.

System Fan (90B)

ENTER-Continue Startup.)

when I turn on my laptop this popup appears.

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oldturkey03 @oldturkey03 Rep: 859,6k 1,4k 974 2,4k · Answer 1 · 2026-08-16T13:54:20-07:00

oldturkey03 @oldturkey03

Rep: 859,6k

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Gepost: 16 aug 2026

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@ffking got to love your computer for doing this. At least it stops you from overheating your processor. Now, you need to determine why it does this. First off you want to check the air inlet for any major debris. Remove the bottom cover and clean all the air inlet slots with some Air-in-a-can and a soft brush. Then check the fan for any debris, occlusion etc. your must clean that as well.

It is absolutely possible that this could also be a failed fan. Use the HP 15s Du0000 Maintenance And Service Guide to replace it. Do not forget to repaste your heatsink thermal paste as well. Once your computer threatens to overheat, it will always be beneficial to do that. Use something like this guide Aanbrengen van koelpasta to get that done

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HP 15s-du0000 Series

System Fan (90B) Error

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