Due to the double-layer motherboard, physical conditions or water damage corrode may cause the motherboard to touch the working line pad break off Inveracious Soldering or water damage corrode. Therefore, the functional failure of screen Touch failure appears. In the future, we only need to measure and touch water damage corrode, and then we can sum up the clear maintenance direction and ideas by combining the causes of the failure.
iPhone earpiece is silent. The measurement found that earpiece BTB connector was broken. Only need to patch Repeat welding to the solder joints of Inveracious Soldering pad break off, and then the welding motherboard will be perfectly repaired.
iPhone 11 Won't Turn On, the detection found that a main VCC Capacitor has obvious abnormalities, remove this Capacitor diode value and return to normal.
Xunwei students changed from Xiaobai to maintenance coffee in one month, and successfully repaired the multiple fault repair process of iPhone 8 mobile phone Won't Turn On.
IPhone6s didn't respond when it was turned on, and Update System reported an error of 4013. The detection found that it was Inductor pin bit, and the reverse side dropped an pin. Repair after replacement.
iPhone 6S has always been no serviecs, which shows that there is something wrong with the signal reception. Find the common points of the signals received by these three operators, namely RF,ANT Switch, and after replacing RF, the fault is relieved.
iPhone 6s Plus water damage Capacitor and Measuring diode value found that it was 3V VCC Short circuit of fingerprint. Look at the points that are connected to several filters no booting. Repair the fault after direct removal.
iPhone XR suddenly used no display, and the mobile phone turned on no booting. After detection, Capacitor was found to be broken, and the fault was repaired after replacement.
Peer repair machine iPhone X mobile phone can't be charged, measure charging management U3300 diode value, find A4 disconnected,Jump wire OK, spike.
Previously repaired iPhone6 Plus Backlight/Screen Half Black, turn it off automatically after a while, and find a fault after detection,Jump wire is done.
