from yesterday our rut240 has started to do this problem.
Modem starts > led blinking > internet reached and stable level signal strenght led > working internet for 3 minutes or less (both direct ethernet cable from lan and wifi too) > suddently no working internet, wifi disappear too, all leds on the modem turn off (except power on led that stay on).
How to fix?
The rut240 has 1 month lifetime, last fw installed from day one.
PS. if i remove the power supply cable and wait some seconds the cycle restarts.
in attachment the trobleshooter file.