up until yesterday my AndoirdTv powered PHILIPS 55PUS6401/12 ultra HD was running very smoothly. I turn it on today and bham, no wifi. i tried reconnecting to the wifi network, it displays a screen to enter the password, which the field pre-filled, i assume already saved in its memory, but nothing happens when i push the "Ok" button no the TV remote control. At the bottom of this same screen i see the Android TV remote control app logo and it says "Use keyboard on your mobile device". how i am supposed to do that if i cannot connect to the damn thing?! so i figure i will connect remotely with bluetooth. Nope, the app cannot see the TV at all.... bluetooth is turned on on both devices. what to do?
EDIT: use exact message displayed by the TV
When this happens on my mi box a reboot usually fixes it. If it keeps losing the wifi password and refusing to connect I found out my router had a DHCP issue. Once router was factory reset it worked perfect again. Hope this is of some use.