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  • I need help because when I first turned on the laptop it said smart hard disk error 301 but I let it go and enter was written but after a few days I opened it again and entered and it got stuck saying diagnosing pc and won't open I need help because I use it for work
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When the Diagnostic ran, what were the results for the hard drive?  The message sounds as though the drive was failing and the message was a warning.  If it will not boot anymore, then most likely the hard drive has failed.

To verify that, run the Diagnostics routine again.

To run the Diagnostics routine, Start tapping the Esc key BEFORE starting the PC and then press the start button.
Keep tapping the Esc key until a popup menu shows. Then pick Diagnostics from that popup menu, F2.
Report back with the results and the model number for better help.


I'm not an HP employee.
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