OPPO R15 mobile phone does not display fault maintenance when it is turned on

OPPO R15 mobile phone does not display fault maintenance when it is turned on.

Directly replace a good screen for testing, and find that the phone can be turned on normally, and the screen can display images, indicating that the original screen is damaged by water. Replace a new screen directly and fix the fault.

Machine model: OPPO R15

Fault phenomenon: The customer describes that the mobile phone will not turn on when it is flooded, and the machine vibrates when the power button is pressed, but the display screen will not display.

Fault analysis: the mobile phone does not display when it is turned on after entering water, which has the following problems:

1, water damage to the screen;

2. Water ingress causes the screen cable to be corroded;

3. The motherboard shows that the cable seat is corroded;

4. The display circuit of the main board is corroded and damaged.

Maintenance process: take the machine to test, press the power button, the mobile phone vibrates, and the screen is black.

OPPO R15 mobile phone does not display fault maintenance when it is turned on. Figure 1

When the mobile phone was disassembled for inspection, it was found that the customer had disassembled the machine himself and the battery was not properly attached. Check the motherboard, display cable seat and display cable. There are no obvious corrosion marks in these places.