GeekBar-the working state of iPhone7 without hard disk

This video gives you the working state of iPhone7 without hard disk
After you press the start button
We can see that the working current of the mobile phone is set at about 40ma
Same as iPhone6s tested before
The apple logo appears on the phone when it swipes
The error message of the brush is also 4014
Based on previous experience with several models tested
If you encountered a brush error 4014
The apple logo can appear on the screen
Then you can get rid of the hard drive first
Update mobile phone maintenance technology and share on a daily basis
Thank you for your support and attention
Double click to for the channel
Thank you very much