What's the model number of your extender? What's the light status? Can you get internet from your router directly? You may unplug the extender to test.

Model number is: TL-WA850REThere are three light for signal range,(like before when it was functioning) and the three lights for power,wireless and REI can connect directly to the router with phone and with computer.That's why I don't know why it doesn't work. The router is the same,the position is the same.. Only thing is that it doesnt provide me connection to the internet.