The HP Compaq Presario C700 is a notebook computer.

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Screen brightness is not working

My C785TU laptop get automatically turned its backlight off after shaking of the laptop. if a magnet is shown near the wifi on/off switch it blinks and again the backlight goes off. Which part should i replace in my laptop

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There is an internal display switch in the lid (see link ) which turns off the display when the lid is closed. I think there is a magnet in the body of the laptop where the switch sits above when the lid is closed, to operate the switch.

The link is for the whole service manual ( I've just selected 1 page).

Hopefully this is of some help

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