I have a Samsung XE303C12 Chromebook. It does not always connect to the Internet. One day I will sign in and I can connect normally and then another time I will get the message "Network Not Found" and the WiFi switch is off and I can't turn it back on (it keeps sliding back to the off position). I already Powerwashed the Chromebook and it worked and then it didn't. I'm not sure what else I can do.