Ref: IKM139811 HP Support Error Codes or error 90f occurs while starting the HP laptop. Both error codes indicate that there is a problem with the HP laptop system fan. It is not recommended to continue using the laptop, because the cooling fan is not working properly, which could lead to an accidental shutdown and the loss of your data.If HP error 90b orrucs, the laptop usually shuts down within 15 seconds.
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