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Lenovo thinpad E430 notebook is not powered on for repair
Machine model: Lenovo ThinPad E430
Malfunction: Notebook no booting
Maintenance process:
A ThinPad E430 notebook no booting. Disassemble the machine. After testing 3V 5V, the test EC lacks ACIN. According to the drawing, it is sent by LM339 of PU101.
Lenovo thinpad E430 notebook is not powered on for repair figure1.
After finding the corresponding LM339, it is found that the resistance of pin is serious corrode.
Lenovo thinpad E430 notebook is not powered on for repair figure2.
With a slight scratch, the resistor fell off, and PAD was gone.
Lenovo thinpad E430 notebook is not powered on for repair figure3.
Replace a 10K resistor.
Lenovo thinpad E430 notebook is not powered on for repair figure4.
Commissioning, ACIN has been sent out, power on and start up,Normally booting up.
Lenovo thinpad E430 notebook is not powered on for repair figure5.
