Black screen, no vibration, no charging.
A dead battery, a loose connector, or a short on the board.
We bench-test it to tell battery, screen or board apart, and quote you before repairing.
It depends on the model and on what we find inside, so we quote each repair individually. The diagnosis fee depends on the device, and you approve the exact repair price before any repair starts. If it can't be fixed, you only pay the diagnosis.