Something spilled on it and it won’t turn on or glitches.
Corrosion on the board or power supply.
Unplug it and don’t power it on. Teardown, ultrasonic cleaning and testing.
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.