The customer sent the iPhone 6 to us without any words, so we have to test it step by step. right, he said it is black screen when he playing the game. So we doubt there exist some fault in capacitor.
Fist, open the wuxinji diagram and find the iPhone 6 display socket circuit diagram.
Next, use Fluke 15B+ Digital Multimeter to measure the diode data of iPhone display touch socket, finding the 26 pin circuit is shorted; The display screen is positive 5.7V.
According to iPhone schematic diagram, we know that this circuit is output by iPhone display touch IC, there are 6 filter capacitors on this circuit line.
Based on previous repair experience, we judged that the filter capacitors are damaged. Put iPhone motherboard under the Phone Repair 7-45X Trinocular Stereo Microscope, and then remove the filter capacitors one by one, when breaking into the third filter capacitor, the data measured is normal.
After you finished the above step, install the iPhone, boot it, we can see the logo appears on the screen. Then we test other function, all of it is normal, so the repair ends here.
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