In Nokia Lumia 820 USB cable connector is also used for charging the phone. Because of excessive use or any other reason USB connector can be damaged.
So if you are experiencing any charging problem or problem connecting your Nokia 820 to your computer via USB cable then it is possible that your Nokia Lumia 820charging connector is faulty. Replacing it with a new one is the only solution here. But if by any chance the USB connector prints are broken then you have to make the jumpers as shown in the diagram below.
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After removing the body of your Lumia 820, the very first thing that you need to do is to re-solder the charging connector and check.
Now check all Track, ways marked in below image.
The next thing that you need to do is to check connector of charging dock, clean the charging dock. If it is still faulty even after cleaning then change the entire charging dock.
Now check on-board connector, clean and re-solder it.
Now finally Remove Charging IC Z3310 And Z3301, And Make Jumper.
All of the above steps will surely help you to resolve your Nokia Lumia 820 charging problems in the best possible manner. If you are lucky enough then simple workaround method will get the job done for you.
Check our Nokia Lumia 920 Insert Sim Card Solution.
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Note: Please note that even though every solution posted on our website is tested by one or more members of our team before posting, but still we do not take any responsibility for any damage it may cause to your cell phones. Use these repairing solutions at your own risk. Thank You.