Red rice note 8 Pro does not take photos when water enters

Machine model: Redmi note 8 Pro

Fault phenomenon: the machine is water damage, open the camera prompt unable to connect to the camera, please restartmobile phone.

Red rice note 8 Pro does not take photos when water enters Figure 1.

Fault analysis:water damage caused by not taking pictures is mainly VCC,corrode and I2C corrode.
Maintenance process: observe that the main board camera BTB connector is very clean.corrode traces are found on the left side of BTB connector in front of the camera.

Red rice note 8 Pro does not take photos when water enters Figure 2.

After cleaning, the boot failure still remains.A pin Inveracious Soldering was found after careful observation of the rear main image head BTB connector.

Red rice note 8 Pro does not take photos when water enters Figure 3.

Pull the tweezers, solder pin, and solder paste is added.

Red rice note 8 Pro does not take photos when water enters Figure 4.

Red rice note 8 Pro does not take photos when water enters Figure 5.

Repeat welding hit diode value to return to normal, boot test failure is still the same.

Red rice note 8 Pro does not take photos when water enters Figure 6.

From Boardview, we know that the VCC of the main camera comes from several pentagonal tubes in shielding cover.

Red rice note 8 Pro does not take photos when water enters Figure 7.

It is very clean to disassemble shielding cover.The main camera I2C is directly connected to the CPU without pulling up.

Red rice note 8 Pro does not take photos when water enters Figure 8.

The desoldered pin is all I2C. Now diode value is normal. Considering that the overall motherboard is a small amount of slight corrode,VCC and I2C are basically excluded.Install a rear master Camera separately, and it can take pictures after startup test.

Red rice note 8 Pro does not take photos when water enters Figure 9.

Therefore, each Camera was installed one by one. It was found that the camera could not be turned on when the front image head was installed. If the camera icon was pressed for a long time, the front shoot could not be opened.So we check the prefix and BTB connector here.