GeekBar-the working state of iPhone7 without i2C1 bus

What video brings to you in this period is the working state of iPhone7 without i2C1 bus
Press the start button
We'll see that the starting current of the phone goes up to 50ma
We go to 80ma and then we go back to 50ma and then we go back to 0
Oscilloscope has no waveform
Next, let's compare the current and waveform of a normal machine
And then we connect the phone to iTunes
The phone's screen doesn't respond when rooting
You'll see a 4005 error message in a moment
Every day I will share video of mobile phone maintenance technology
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[@teknisitua6110]

Then, where the defective part or ways?