GeekBar-the working state of iPhone7 without logic chip

This video gives you the working state of iPhone7 without logic chip
Press the start button
We can see the phenomenon of restarting the phone immediately after the appearance of the apple logo
Then we see that the starting current of the phone is very similar to that of a normal phone
Then we did a root test
We'll see in a second that the reader is reporting an error of 9
The iPhone7 test results are basically the same as those of previous models
So we infer that
IPhone8 models after the occurrence of this failure phenomenon
Most likely it is also the result of the logic chip
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[@kurdduhok1635]

what is the name logic chip