Did you contact your ISP to check the line?
It was working with the same ISP and stopped working suddenly, right?
http://www.tp-link.in/support/rma/

Vivian wrote

Did you contact your ISP to check the line?
It was working with the same ISP and stopped working suddenly, right?
http://www.tp-link.in/support/rma/

ya it stopped working. i checked with other modem provided by service provider it is working fine but when i connect tplink modem only dsl light flashes for some time and again goes off. remaining lights like LAN and WI FI are glowing fully. also i dont remember when i have purchased. but as per the serial no. it is manufactured in December 2012 which means it is still under warranty.
please guide me what to do?

Thanks.

Did you read http://www.tp-link.in/support/rma/? There are details about how to get a replacement.

i read and called technical support desk and now they asked me to send modem to Mumbai. They will check it and further process it.

thanks for your support.