Redmi Note8 mobile phone does not show maintenance on the water inlet boot screen

Redmi Note8 mobile phone does not show maintenance on the water inlet boot screen.

Disassemble the shield and find that there is corrosion above the chip. There is also some corrosion when the inductor foot is removed. This is the boost inductor of the display input, so replace it directly.

Machine model: Redmi Note8

Malfunction: the phone’s water inlet power-on screen does not display.

Maintenance process:

A Redmi note8, the mobile phone is turned on without display and backlight after water ingress. If the display light control fails due to water ingress, check the power supply corrosion first.

Maintenance figure 1 is not displayed on the water inlet boot screen of Redmi Note8 mobile phone.

First of all, observe that the light control part of the main board is sealed with glue, and there is no trace of water entering.

Maintenance figure 2 is not displayed on the water inlet boot screen of Redmi Note8 mobile phone.

The observation seat is also very clean.

Redmi Note8 mobile phone does not show maintenance figure 3 on the water inlet boot screen.

Redmi Note8 mobile phone does not show maintenance figure 4 on the water inlet boot screen.

Find the display ic integrated in the charging ic according to the dot bitmap.

Maintenance figure 5 is not displayed on the water inlet boot screen of Redmi Note8 mobile phone.

Disassemble the shield and find that there is corrosion above the chip.

Redmi Note8 mobile phone does not show maintenance on the water inlet boot screen. Figure 6

There is also some corrosion when the inductor foot is removed.

Redmi Note8 mobile phone does not show maintenance on the water inlet boot screen. Figure 7

This is the boost inductor of the display input, so replace it directly.

Redmi Note8 mobile phone does not show maintenance on the water inlet boot screen Figure 8.

Boot test, perfect repair.

Redmi Note8 mobile phone does not show maintenance on the water inlet boot screen. Figure 9