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Huawei Mate 30 Pro 4G version,mobile phone The fault is that the mobile phone does not display, you can hear the sound when you make a phone call and charge, but you can't see the screen display. In view of this problem, how should we deal with maintenance? The following professional maintenance master tells you!

The actual fault is that the phone can't be called because there is no base band, because Apple is above X.mobile phone They are all designed with a double-layer motherboard, and the base band is in the lower layer, so we can directly disassemble the machine for layering, which is caused by virtual welding of the upper and lower layers. After planting tin on the lower layer and attaching it to the upper and lower layers again, it is confirmed that there is no short circuit, and the installed button screen is booted into the system and found that the base band already exists, and the serial number is normal.

Xiao mi 11 WiFi can't be used. This kind of fault can still be said to be a common fault of Xiaomi 11. The pot of Snapdragon 888 is likely to be a fault caused by CPU virtual welding. The specific maintenance process is as follows:

IPad mini4 A1538 does not turn on or charge. “Machine model” iPad mini4 A1538 【 Fault Phenomenon 】 No power-on and no charging [Maintenance process] I received an iPad mini4 tablet, model A1538, which was sent by a customer for…

Huawei mate x2, the phone got water after getting wet, the speaker was hoarse, and the tail plug was changed after the sale; However, after a period of use, the mobile phone suddenly lost its signal, and the after-sales notification was a motherboard problem. After a series of problems appear, how to solve them? Then give it to our maintenance master!