(1) In Boot Menu -> Change FastStart to [Disable] (2) In Security Menu -> Change Secure Boot to [Disable] (3) Then 'Save Configuration & Exit', when the BIOS screen appears again (4) Go to the Boot Menu again -> Change Launch CSM to [Enable]
Agree with @ samy , as well before applying new strip, clean frame with ipa to remove any skin oils or adhesive leftovers. After applying strips and sticking screen on , add some books all over the ipad and leave it for at least several hrs in room temp. Adhesive strips needs some time to make a good bond
Ive done it using heat and OEM button. First attempt to use glass only from ebay was unsuccessful. Touch didint worked. So ive used spare button as a donnor . And regarding adhesive- UV curable same as you wold be using for digitiser only repair
Could you be more specific please? Is it still usable? If battery is empty and u put on charge and then starts blinking it could be a sign of weak battery or poor connection of you charging port/lightning cable.