My PS4 won’t leave safe mode

Hello,

So this morning my PS4 just stopped working. It was working perfectly fine until the game started lagging mid way so I restarted the PS4. It was put in a endless cycle saying it was restarting so I unplugged the cord. And now the PS4 won’t get out of the checking system storage black screen thing and it’s stuck at 4%. Eventually the black screen thing just stopped and said “Cannot start ps4” and it asked me to plug in my USB connected to a controller so I did and it asked for update 6.50 on a USB. And sadly I cannot reach the safe mode because the power button on the front panel doesn’t work.