iPhone 6S Plus can't start, how to repair it?
Have you ever encountered a situation where your phone can't be activated? How did you solve it? We received an iPhone 6Plus and the iPhone 6S Plus could not be activated. The following is our solution.
After receiving the phone, there was no response after plugging in the charger. Then, using the Phone Opening Tool to disassemble and connect it to the adjustable power supply, the iphone 1505TA 15V 5A DC power supply is a good choice. Just found that the motherboard's large current is not turned on. However, after two seconds, the phone miraculously does not short circuit. Maybe the current is too large and the damaged parts will be burned. After launching, we found that the screen of the phone was half black and half bright.
After testing the J4200, it displays seat pin 5 PP_LCM_BL34_ANODE_CONN backlight anode short circuit, tear off the black leather, and found that the light D4050 diode has burned and ruptured, the resistance of the diode at both ends is 941 after testing, so it is obviously damaged
According to the initial faultys that cannot boot, we can say that capacitor is damaged, causing a large current short circuit, burning through the diode and the inductor, you can replace the damaged ones use iphone diode capacitor and finally burning the backlight power together to cause the yin and yang screen. So it is necessary for us to find a short-circuit capacitor to replace the inductor, the diode, and the backlight power supply now. After testing, we found that the C4053 capacitor has obvious discoloration. The L4050 inductor appeared tin ball because of large current and high temperature. But MT-936 MT-943 adjustable temperature soldering iron station can avoid this situation. L4051 inductor is discolored and cracked. L4020 inductor also has crack marks. Removing the C4050 and it has already burned like this.
The next step is to replace C4053, L4050, L4051, L4020, D4051, D4050. After replacement, you need to measure the resistance of the two diodes. After everything is ok, install the U4050 backlight chip. Repair is completed.
For more information on mobile phone repair phone repair tools, you can visit www.vipprogrammer.com.
After receiving the phone, there was no response after plugging in the charger. Then, using the Phone Opening Tool to disassemble and connect it to the adjustable power supply, the iphone 1505TA 15V 5A DC power supply is a good choice. Just found that the motherboard's large current is not turned on. However, after two seconds, the phone miraculously does not short circuit. Maybe the current is too large and the damaged parts will be burned. After launching, we found that the screen of the phone was half black and half bright.
After testing the J4200, it displays seat pin 5 PP_LCM_BL34_ANODE_CONN backlight anode short circuit, tear off the black leather, and found that the light D4050 diode has burned and ruptured, the resistance of the diode at both ends is 941 after testing, so it is obviously damaged
According to the initial faultys that cannot boot, we can say that capacitor is damaged, causing a large current short circuit, burning through the diode and the inductor, you can replace the damaged ones use iphone diode capacitor and finally burning the backlight power together to cause the yin and yang screen. So it is necessary for us to find a short-circuit capacitor to replace the inductor, the diode, and the backlight power supply now. After testing, we found that the C4053 capacitor has obvious discoloration. The L4050 inductor appeared tin ball because of large current and high temperature. But MT-936 MT-943 adjustable temperature soldering iron station can avoid this situation. L4051 inductor is discolored and cracked. L4020 inductor also has crack marks. Removing the C4050 and it has already burned like this.
The next step is to replace C4053, L4050, L4051, L4020, D4051, D4050. After replacement, you need to measure the resistance of the two diodes. After everything is ok, install the U4050 backlight chip. Repair is completed.
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