Sir,my display light can't working?m handset no is nokia 1650

Sometimes the backlit gets loose.If there is no light and no image on screen, then you may need to take phone to an electronics store for LCD screen replacement. If there is image, but no light, then:

1. Power off phone
2. Remove back cover
3. Remove battery
4. Remove SIM
5. Using a little flat head screwdriver, unlock and remove the frontal cover of the phone.
6. There are six Torx screwdrivers inside. It's head looks like this:

1. Then use a Torx screwdriver for removing them. If you haven't one, a small triangular file, or a swiss knife will do the job.
2. After so, remove the back plate of your phone.
3. Remove the 4 Torx screwdrivers wich hold the screen in place.
4. Remove the screen.
5. Clean the contactoes between screen and phone.
6. Reinstall screen in place.
7. Repeat steps in inverse order to reassembly the phone.
8. Power on phone. If light stills refusing to work, then take your phone to an electronics store.