If you cannot download the software update on your PS4 directly, there is a way to do it with a USB key. Go to the PlayStation Blog and download the update file to your PC. Then follow the included instructions below and use a USB device to perform a complete System 1.51 update.
Prerequisites: A USB key and a PC connected to the internet (to download the update file). Step 1: Prepare the USB key At the root of the USB key, create a new folder and name it as PS4.Open the PS4 folder and create subfolder named as UPDATE.The folder names are case sensitive(USB key PS4 UPDATE).Step 2: Download the update file. Make sure any notification relating to the PS4 update 6.02 is deleted. Then download the file onto USB from your PC, making sure you follow the exact instructions under ( Update Using A Computer.
Instructions Provided by Playstation Blog:
Information Provided By: https://us.playstation.com/support/systemupdates/ps4/new-install/
Power went out. Now Ps4 displays the following message: Ps4 Cannot Start. Attach Usb with 5.05 software or more.
Already tried that several times with the right file (900+mb) doesn't work. Tried removing HDD and checking it's functionality... It works perfectly.. I formatted it manually on PC and tried again still didn't work. What can I do to fix it?
Some guy in a PS store told me that there's a problem with the NAND which I didn't understand and said he couldn't fix it.
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Try this https://www.playstation.com/en-us/suppor...