Repair of dark screen of Lenovo Xiaoxin Air 14IKBR notebook computer

Lenovo Xiaoxin Air 14IKBR laptop has a dark screen, traced it to Q1, measured the breakdown short circuit of 2-3 pins, removed the corresponding Q1 tube and insurance on the material board, and turned it on perfectly after the replacement.

Machine model: Lenovo Xiaoxin Air 14IKBR notebook

Malfunction: the laptop screen is dark.

Maintenance process:

A Lenovo Xiaoxin Air 14IKBR notebook, the fault is that the laptop screen is dark and the backlight is not bright.

Disassembly and replacement screens can be displayed normally. This screen has glass in the front, so the replacement cost is expensive. Choose the maintenance screen and screen model.

Lenovo Xiaoxin Air 14IKBR notebook computer dark screen maintenance Figure 1

When the screen is turned on, it is found that the screen backlight insurance F2 63V/1.5A is open.

Lenovo Xiaoxin Air 14IKBR notebook computer dark screen maintenance Figure 2

The rear safety stage is open to ground.

Lenovo Xiaoxin Air 14IKBR notebook computer dark screen maintenance Figure 3

Trace to Q1, measure the breakdown short circuit of 2-3 pins, disassemble the corresponding Q1 pipe and insurance on the material board, and after the replacement is completed, turn it on and light it up perfectly.