Mobile power is not on

@gauravarya47 you are really not telling us much. It would be good to know if anything happened to the phone. It would also be good to know what you have checked.

For now, try this generic answer to see if it gets you at least where you can narrow the possibilities down.

First check your charger. Make sure it has proper output. Then check your charging cable. Check to make sure the 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.

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.