История для "Apple logo blinking and red screen"

Hello, i have an ipad mini 2 wifi. The battery was defective and i replace it. Once I turned it on the apple logo started blinking and a quick red screen comes then it keeps blinking the logo.

Tried hard resetting and made no difference.

Tried connecting it to the computer (iTunes), no effect.

Re opened to check the battery connection, no effect.

What could it be? Thank you.

Устройство:

iPad Mini 2 Wi-Fi

Статус:

open