Laptop shows system error 90B

90B is a generic fan error on the consumer series. You need to replace your CPU fan - without the model, we can't get you the part number, with how many "HP 14" models from the Stream 14 (fanless), the "Celeron totally not an HP Stream except we literally spec them the same" models, even some i5/i7 models are made, but if you search your model with CPU fan, you can probably find a replacement.

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