Ipad swiching off like a problem in the magnetic sensor

Hi,

I have and Ipad Air A1474. It is a quite old one, but I would like to use it as HomeAssisstant dashboard.

The Ipad randomly switch on and off the screen, mimicking the presence and absence of the magnetic cover. Making it completelly useless

I was trying to desolder de magnetic sensor (the one that sense the cover), but looking in the guides, I don't see where it is placed... nor how to replace it...

I see that the Ipad air 2 has such sensor, but would like to understand how to fix such behaviour, and where I can find the sensor to see if it is replaceble.

Thanks in advance for your help