My display of iphone 14 pro max is green I need display solution

First, try a forced restart.

• Press and quickly release the volume up button

• Press and quickly release the volume down button

• Press and hold the side button.

• When the Apple logo appears, release the button.

Force restart iPhone - Apple Support (IN)

If that doesn't work, make an appointment at the Genius Bar to have it diagnosed.

Genius Bar Reservation and Apple Support Options - Apple

"I need to change my diplay free"

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Please Emphasize your Post:

Are you looking for a new screen, free of charge? If a faulty device, then that may apply, if still in warranty.

If N/A to the OP's post, then you need to create your own thread.

Make an appointment at the Genius Bar to have it diagnosed.

Genius Bar Reservation and Apple Support Options - Apple

I need to change my diplay free

1 year done for buy also thats not our fault