Users reporting PSN sign-in issues and console issues following 2.00 update on PS4
Multiple users who've downloaded the latest PS4 system update, update 2.00, are reporting that they're not able to turn their console on, while others are not able to connect PSN.
Some users on Reddit, multiple users on NeoGAF, the PS Blog and on Twitter, are reporting that they weren't able to connect to PSN after applying the update.
Others have more pressing issues; such as not being able to turn the console on after putting it in 'Rest Mode'.
Sony provided multiple sites with the following statement, "We are aware of issues reported by some PS4 users following the release of PS4's latest system software update, v2.00.
"We are investigating these issues and will provide an update as soon as we have more information," the statement read.
You may also want try and unplug your console for 30 seconds, and plug it back in, if you're having any of those issues.