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Power button randomly presses itself

Hi guys,

Got a randomly rebooting iPhone 3G here that worked fine docked for some reason.

Replaced the battery using the guide found on this site.

Back together the phone worked fine but it kept locking itself and showing the power off slide bar. I have a feeling that the power button presses itself randomly or something.

What can I do to fix this except cleaning the buttons and hoping that that works? Going to try that later today.

Update

Ive cleaned the power button and the power button contacts. The button stil doesnt work. Im trying to take the phone apart again to see if it solves the problem.

Volume buttons work fine as does the vibration switch. Could it still be the flex that is broken or is it more likely the actual button isnt making contact with the flex.

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I have removed cable 5 from the logic board. The problem is gone so next step is to try and take apart the button and clean it or install a new flex.

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You first need to find out wether it is actually the button itself that is causing the issue or something else. Try this:

Remove the connector #5 which is connecting the power button to the mainboard with a powered phone. Check if the problem still persists:

- Problem is gone → There is a problem with the physical power button. Replace this flex to solve the problem or you might try to disassemble the power button and clean between the metal of the button and the gold traces on the flex.

- Problem still persists → Problem with your logic board. Had this one time before. Ultrasonic cleaned the Logic board solved the problem that time.

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+ good clear explanation.

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sometimes the center middle dimple gets pushed out of center. remove and use clear light scotch tape and re install metal dimple back to the center position. worked for me. good luck

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Stefan estará eternamente agradecido.
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