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Lenovo Xiaoxin air 14ikbr notebook screen dark repair
Machine model: Lenovo Xiaoxin air 14ikbr
Fault phenomenon: notebook screen is dark
Maintenance process:
A Lenovo small new air 14ikbr notebook, the fault is the notebook computer dark screen, backlight is not bright.
The screen can be displayed normally when the machine is disassembled and replaced. The front side of this screen is provided with glass, so the replacement cost is relatively expensive. Select the maintenance screen and screen model.
Lenovo Xiaoxin air 14ikbr notebook screen dark maintenance Figure 1.
Power on, measurement found screen backlight Fuse F2 63v / 1.5A open circuit.
Lenovo Xiaoxin air 14ikbr notebook screen dark maintenance Figure 2.
Fuse rear stage is open to ground.
Lenovo Xiaoxin air 14ikbr notebook screen dark maintenance Figure 3.
Trace to Q1, measure 2-3 pin, breakdown Short circuit, remove corresponding Q1 MOSFET and Fuse from Parts motherboard, and turn on the machine perfectly after replacement.
Lenovo Xiaoxin air 14ikbr notebook screen dark maintenance Figure 4.
