Ipad Air Not Charging When Turned On. Recharge The iPad If you see the red empty battery icon your iPad will not be able to reboot until there is a certain amount of charge in the battery. Leave it to charge for a minimum of five hours then turn it on again to see if the problem has gone away.
On a Mac with macOS Mojave 1014 or earlier or on a PC open. Make sure that your power adapter can charge your iPad. You need to make sure both your cable and port are working and they are in good condition.
Make sure that your power adapter can charge your iPad.
Locate your device on your computer. Therefore re-plug your iPad into a different USB port and check if the iPad starts to charge. If not continue trying methods left. Check Your iPads Charger Sometimes iPads wont charge and turn back on depending on the charger you plug it into.