i found what the cause. Wireless conection is crashed if on PC (or other wi-fi connected device, e.g mobile phone) current date greater than real date or much latter. but problem not instant,...

Region : Argentina Model : TL-WR740N Hardware Version : V5 Firmware Version : ISP : any body knows this changes? wi-fi falling off all the time and in desperation I decided to upgrade device with fw...

ok thanks, i'll try

Region : Argentina Model : TL-WR740N Hardware Version : V5 Firmware Version : ISP : Very often when connecting / disconnecting some devices the router lost wi-fi connection. I must to switch off and...