Nokia 1110i lost screen light

This Pan has been a long time, but today I met up on the permission to share with you, who knows then please do not throw me poor stones. Here is the Nokia 1110i solution that loses the screen light, you check the diagram below.

TH1: You check the keyboard light, if the keyboard lamp is missing or bright, replace the keyboard light.

TH2: Check the voltage at the connect screen's foot according to the following figure.

TH3: If you have done the above steps, don't ok, then you can test according to the diagram below.

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Good luck!