Did you confirm username and password for internet connection with your ISP? Try to set up a PPPoE connection on your PC directly to the modem and test if it works.

Can you use command prompt on PC to telnet?

anindianforor wrote I am having a similar issue as you.. My PC's wireless adapter keeps loosing the connectivity with the Router's ethernet port (192.168.1.1) randomly. Did you get any solution on...

Can you delete network profiles and reconnect? Any error message? What kinds of 5GHz clients?

Upgrade latest firmware, reset and reconfigure it. Confused about what your described, 1. no internet... 3. speedtest...How did test speed if you have no internet access?

1310nm is the right one. :)