After the iPhone X fell heavily, the phone screen did not respond to maintenance

After the iPhone X fell heavily, the phone screen did not respond to maintenance

Machine model: iPhone X.

Malfunction: the screen of mobile phone is not responding.

Maintenance process: a national bank of Fall hard, 256G iPhone X, was completely unrecognizable in front and back, and the middle frame was bent. when Touch failure no Baseband Version, i4 soft were turned on, the former Rear Camera could not be read, and other functions could not be tested. 

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 1. 

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 2.

The upper DC power supply Connect the power supply leaked 50mA (the single board test was normal, and it was found that the leakage of Connect the power supply caused by the domestic screen was 50mA). The mainboard was removed and found that there was no maintenance trace, but the lower layer was obviously deformed.

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 3.

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 4.

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 5.

After backing up the underlying WiFi and unbinding it directly, separate(Move Board (move the main chips to another motherboard)is mostly needed for iPhone x machines), and separate found that pad break off in the upper layer was serious, while the lower layer was deformed and disconnected in many places. The maintenance plan is to make up points at the upper level and Move Board (move the main chips to another motherboard)at the lower level.

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 6.

The upper layer has no problem in measuring diode value, and the lower layer has moved Baseband and nf EEPROM, which are read and written through equipment. WiFi has been unbundled in advance, so it is not necessary to move. the upper layer is deformed, so welding has been successfully moved several times before and after.

After the iPhone x fell heavily, the phone screen did not respond to maintenance figure 7.

The welding test current is normal, and the touch, WiFi, bluetooth, Baseband, and coder are normal in the case test. the former Rear Camera still cannot be opened, and Update System is invalid.mobile phone The assistant connecting Bandung found that infrared Camera Camera could not be read out, and suspected that infrared Camera was broken and could not be opened before and after. infrared Camera is normal when a good infrared Camera is replaced. The original infrared Camera xt5901 was disassembled and found that the chip was brOKen, and Face ID could no longer be repaired. Other functions of the installation were ok. This time, the chassis assembly and screen assembly were replaced, the lower layer was moved, and infrared Camera shoot was replaced.