iPad 4 error, the power button can't be turned on, can't power off, can't power off. In the machine that is losing power, it can't be turned on, you can try it by plugging in the charger. If the device has power, it will turn on normally, only the power button has no effect.
How to identify iPad 4 power button failure due to Main :
- Replaced the test cable and it still doesn't work.
- Pressing the power button has no effect. Remove the main and get tweezers to clamp it if it doesn't work, it's the main fault.
