Kevin SG wrote

Do you mean all lights are solid on or just several lights are on?
It is normal for the lights are solid on.
Make sure the dsl light and internet light are on, otherwise you won't get internet.
Here is an User Guide for it. Check it for the status of the lights:
http://static.tp-link.com/TD-W9977(EU)_V1_User Guide.pdf

iGraphics wrote

Thanks for reply.

Yes, It's working fine but wifi LED not blinking (always ON) That's not good. I have TP-LINK N600 the Wifi LED is blinking!

Why The TD-W9977 wifi LED is always ON ?

uutommi wrote

This is a hardware design. Different modems may have different design.
My TD-W9977 has a solid wifi LED as well but it works perfectly.