if you are facing power switch button on off problem in Nokia N91 then
here is a diagram that will help you to solve Power switch problem in
first stem remove the old power switch button form Nokia 7710 Power Switch Button Damage Problem Solution.
board and then check prints two of them are ground and other two are going to this resistance and then goes to power ic so this will help you to solve on off switch button problem in case power switch button prints are also damage.
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