my phone won't turn on

it just shows blue and black areas going up and down what is wrong

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Are you annoying from the Samsung galaxy blank screen problem? sometimes suddenly phone screen not working or unresponsive touch screen on galaxy . Basic solution to fix blank screen issue of galaxy phone are check your galaxy device screen not damaged or cracked and if use screen protector or case then remove it and check fix issue or not. If not fix then try below given trick to fix your phone issue.

Restart your Samsung galaxy S7 & S7 edge

Turn on safe mode Samsung galaxy S7

Step 1: Turn off your galaxy S7 device
Step 2: Press & hold the power button from galaxy S7 screen
Step 3: While Samsung logo appears on screen, press & hold the volume down button until see “safe mode” in your galaxy S7 screen

Check any app causing any issue or not.

Factory reset your galaxy S7 or Wipe cache partition in your Samsung devices.

To view steps and screenshots of factory reset or Wipe cache partition, visit my site bestusefultips.