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The third generation of the LG Optimus F subseries, released in June 2013, identifiable by the model number LS720.

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LG VM720 is not turning on

Why is the LG VM720 not turning on?

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1 Answer

Make sure that the lock-switch connector is on fully, and that it’s not broken or faulty. Replace the phone battery. Also look for issues with the IC as fluid contact can damage the internal components of these micro computer devices.

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1 Comment:

Mohammd, in your response here, you mentioned to check the lock-switch connector on the Optimus F3, could you point out where that is and what exactly does this switch do? I've never seen this mentioned anywhere else.

Thanks,

Robert

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