Scroll down and follow the instructions on that page where the bolded heading specified above. If you follow the instructions to the T it should work.
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Unless there is a hardware problem which is usually either a faulty hard drive or non-functional blu-ray drive (can be caused by drive board or circuitry of drive controller on board depending on model).
Follow this guide - '''PS4™ Complete System Software File:'''
https://www.playstation.com/en-us/support/system-updates/ps4/#newinstallation
Scroll down and follow the instructions on that page where the bolded heading specified above. If you follow the instructions to the T it should work.