If your cable got problem the level 2 tech will test them with another device like a sharp pin and the slice part will show red light.. really bright one. Saw them done it back then when i complaint speed drop while doing speedtest. Endup the fiberhome modem got problem. Not the adapter but hardware problem they said. Happen last year early feb kot.

its an advantage when people arguing, knowledge also feed to us

thanks to both of you guys