Address
304 North Cardinal
St. Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Huawei Honor 20i Screen Dark repair
Machine model: Huawei Honor 20i
Symptoms: The screen is dark.
Maintenance process:
A Huawei Honor 20i, the screen of the mobile phone is displayed, but the backlight is not on.
Dismantle the machine, take out the motherboard, and type BTB connector on the display screen to diode value. It is found that the LED3- ground diode value is abnormal.
Open Xinzhizao Soft, check the drawings and Boardview, and know that this LED3- is connected to D1 pin of the light boosting IC.
Huawei Honor 20i Screen Dark repair Figure 1.
Remove the IC, test the two places by beeping, and make sure the motherboard is disconnected.
Huawei Honor 20i Screen Dark repair Figure 2.
Go directly to Jump wire, install IC and call Diode value is normal.
Huawei Honor 20i Screen Dark repair Figure 3.
Huawei Honor 20i Screen Dark repair Figure 4.
Huawei Honor 20i Screen Dark repair Figure 5.
Test lighting is normal.
Huawei Honor 20i Screen Dark repair Figure 6.
