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HONOR 50 can’t be turned on
Machine model:HONOR 50
Fault phenomenon: the customer described Honor 50 mobile phone water damage serious,Won’t Turn On.
HONOR 50 can’t be turned on Figure 1.
Repair process: get Honor 50, press the power on button, the phone does not respond, can’t turn on the machine.Remove the machine and take out the main board. Power on the single board. Press the power on key to increase the current by 1mA.This kind of current appears, generally is the power supply does not work, or CLK CPU has a problem.
First of all, the value of CLK is normal, that is, the internal work of the power supply is not normal, resulting in the lack of VCC, the CPU can not work normally, resulting in failure to start the machine. After replacing the pm7325 power chip, the startup current is normal, but the screen does not display.
HONOR 50 can’t be turned on Figure 2.
This machine is Previously repaired, which was repaired by peers. After observation, it was found that a chip was not installed. After checking the drawings, it was found that this chip just showed the VCC chip.
HONOR 50 can’t be turned on Figure 3.
HONOR 50 can’t be turned on Figure 4.
So replace a chip of the same model, after installing it, you can start the display and repair the fault.
HONOR 50 can’t be turned on Figure 5.
