HONOR Play3 boot screen is black.

Model: HONOR Play3

Malfunction: The customer described that HONOR Play3 had vibration when it was turned on, but the screen didn’t show. The screen was tested before maintenance.

Repair process: After getting the mobile phone, turn it on and test it. The fault phenomenon is consistent with the customer’s description. There is vibration when the phone is turned on, and the screen can’t see the picture. The same is true when the phone is turned on with a good screen. In this case, you can give priority to checking the components related to backlight.

HONOR Play3 boot screen is black Figure 1.

Disassemble the main board, find the backlight power supply part according to the drawing, disassemble the shield, and find that the backlight boost diode is broken down, so directly replace a backlight boost diode.

HONOR Play3 boot screen is black Figure 2.

HONOR Play3 boot screen is black Figure 3.

Then put the motherboard back inside the mobile phone for boot test. Press the boot button, the mobile phone vibrates, and the screen displays normally, so it can enter the system, and the fault can be repaired perfectly.