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Honor 10 mobile phone Won’t Turn On repair
Machine model: Honor 10
Test results:mobileWon’t Turn On, press the power-on button to set the current at 50ma.
Fault analysis: According to DC power supply, the machine is probably powered on Current protection, or CPU,Nand and RAM are not working properly.
Because the phone has been repaired. First of all, we should check those places that were repaired by the previous master. And focus on checking whether the components and chips in the maintenance parts are normal.
Honor 10 mobile phone Won’t Turn On repair Figure 1.
After observation, it was found that the previous master Reballing overcharged the chip. However, the failure of the charging chip will not cause such failure. First, repair it in the direction of starting Current protection, and directly remove the power chip for inspection.
Honor 10 mobile phone Won’t Turn On repair Figure 2.
After removing the chip, it was found that the pin bit of the chip had Short bridge, which may be caused by the previous teacher Reballing. At the same time, it is found that pad break off appears in pin bit of Short bridge, which is connected to 38.4M Crystal.
Honor 10 mobile phone Won’t Turn On repair Figure 3.
After repairing PAD of pad break off, the fault was repaired.
Honor 10 mobile phone Won’t Turn On repair Figure 4.
Honor 10 mobile phone Won’t Turn On repair Figure 5.
