@mrprodhan it's actually quite difficult to repair the charging cable. You will need to know where each wire goes. I use a testboard to test each wire so I know where to connect it. It is actually better to just replace the cable.
I am not sure of the charging cable is your actual issue. Let us know if you are certain that you know that it is the charging cable that has failed.
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Here is a generic troubleshooting answer just in case there is more going on with your phone not charging
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First check your charger. Make sure it has proper output. Then check your charging cable. Check to make sure connectors are not bend etc. After that, check the charging port. Clean it of any debris etc, use a few puffs of air to clean it out. If none of this works, get a USB ammeter and see if your phone draws any amperage from the charger. If it does not it is possible that this is a charging port issue or a bad battery.
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To check the charging port, use a voltmeter and measure the voltage on your battery connector. Next plug your phone charger in. Now measure the voltage on your battery connector. That voltage will have to have increased. IF not then the issue is either the port or the charging circuit.
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You also want to check teh flex cables coming from the charging board to the main board. CHeck that for micro tears and corrosion and proper connection to the boards. I suggest that you start with a new battery if any of the above did not work. After that it's the charging board and flex cables.
@mrprodhan it's actually quite difficult to repair the charging cable. You will need to know where each wire goes. I use a testboard to test each wire so I know where to connect it. It is actually better to just replace the cable.
I am not sure of the charging cable is your actual issue. Let us know if you are certain that you know that it is the charging cable that has failed.