My phone is swictched off

"Hi,

When you plug in your charger does the phone show that it is charging?

If so, let it charge for a while, then see if you can start the phone with the charger still connected.

If it does start, shut down and then see if you can fully charge the battery. If it doesn't then the battery is faulty and needs to be replaced.

If the phone does not charge with the charger connected, try another charger.

If it does then your charger is faulty.

If it still doesn't charge with a different charger then the charging circuit in the phone or the battery is faulty"

"Hi @ badar.khayam

All I can suggest sis that you open the phone and disconnect the battery for 5 minutes, then reconnect the battery and check if starts OK.

Here's a video that shows how to open the phone. At 4:12 minutes into the video the battery is seen being disconnected (cable on top left of battery.

You don't have to remove the battery, just disconnect it from the systemboard.

Be very careful when working in a phone. Even though the phone is off there is still power at certain points on the board etc. The Power button is not a power isolating button. It merely signals the operating system as to what the user wants to do. Think of the phone as being in an extremely low power state rather than being totally isolated from the power supply.

Try not to touch anything that you don't have to and also do not short out any components with other components by bridging the tool across two etc"