No connection to WLAN

Hi Guys, i have a big problem. since a few days my macbook cannot connect to wlan at all. no chance with a cabel aswell.

my macbook finds the right router and shows me that is has connected but i cannot open any website at all. and i hvae to give it the password after every restart. i tried everything but nothing helps. everything else works.(programms ect.)

the reason for that problem could be that i wlaked trough the city by very cold temperatures having my macbook just in my backpack. after i opened it after doing that i had to reset the time and the date.

pretty wired! do you guys have any ideas what i could do now??

thanks for your help!!

Answered! View the answer I have this problem too

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What operating system are you running? Did this start after a system update?

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I would start off resetting the SMC. Follow this Apple TN" Intel-based Macs: Resetting the System Management Controller (SMC. After you do you will need to check your network settings are correct.

Next you will need to get your WiFi AP's settings from a second system that is working or what you wrote down. Or if you don't have that info use a wired connection to your internet router so you can connect your system to the internet. Are you able to connect now?

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maik mechanic will be eternally grateful.
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