Nokia 101 Display Light Jumper Solution OK
https://gsmfixer.blogspot.com/2015/09/nokia-101-display-light-jumper-solution.html
Nokia 101 Display Light Problem may occur due to the water damage or problem in the LCD connector so you can clean the motherboard with CTC or thinner.
If the problem still exist then you can repair it by the following hardware diagram. The jumper ways are shown with the colored lines so trace the right points before making jumpers.