Screen is blank or black

# Rebellion: When the display is showing blank, you may check below phenomenon:

- Blank screen all the time
Check if a blank screen occurs at all the time or if it is random? If the user feedback blank screen at all the time, please follow below step:
1. If the handset vibrates when powered on but the screen is pure black or pure white, please contact customer service.
2. If no vibration takes place when turning the device on, try charging more than 15 minutes to ensure the battery isn't dead. If it still won't turn on, contact customer service.

- Blank screen sometimes
Check if a blank screen is occurred at all the time or sometimes? If the answer is that blank screen at sometimes.
Otherwise, please back up all the data, clear cache and flash to the latest OS version.