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Category Laptop Repair Guide

Laptop Repair Guide

Laptop Repair Guide

Lenovo 300S-14isk notebook battery and adapter cannot be serviced at the same time

Check the main power supply of 24780. According to Manual 24780, the output of 24-pin REGN 6-V linear regulator is provided by VCC. The LDO is active when ACDET is higher than 0.6V and VCC is higher than UVLO. After changing PR4413 to 10 ohms, the fault was eliminated and all problems were solved.

yx
2022-12-19

Laptop Repair Guide

Repair of DELL 3421 laptop screen with dark screen and unlit backlight

1 pin EN is normal, 23 pin Vin has no voltage to ground resistance of 0 ohms. After tracing forward, it is found that a current limiting resistor is burned, and a small capacitor is short-circuited behind the current limiting resistor. Find a small resistor of 10 ohms and a small capacitor, and the boot is normal.

yx
2022-12-16

Laptop Repair Guide

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.

yx
2022-12-15

Blog, Laptop Repair Guide

Repair of HP G6 notebook without startup

Lay down the chip value and find that several pin values are abnormal. Measuring the upper and lower tubes shows that the extreme values of G and S of the upper tube are 50. Replace the chip and the upper tube. Power-on standby is normal again, 0.014A triggers 0.073A is normal, the machine is powered on, the machine is turned on perfectly, the fault is eliminated, and the maintenance is over

yx
2022-12-14

Laptop Repair Guide

Lenovo Y700-14ISK notebook screen does not show repair

Lenovo Y700-14ISK notebook screen does not show repair Machine model: Lenovo Y700-141SK notebook Main board number: LA-C951P REV1.0 Malfunction: The notebook screen does not display. Maintenance process: A Lenovo Y700-14ISK notebook, the fault is that the power indicator lights up,…

yx
2022-12-13

Laptop Repair Guide

Repair of Dell G3 579 laptop without charging

Repair of Dell G3 579 laptop without charging Dell’s G3 579 laptop doesn’t charge. When the chip is changed to PU01 19V, PQ7 G is more than 9V normal. However, when the battery is turned on, it still loses power,…

yx
2022-12-12

Laptop Repair Guide

Lenovo ThinkPad X1 Yoga notebook computer maintenance without charging

Lenovo ThinkPad X1 Yoga notebook computer maintenance without charging Lenovo ThinkPad X1 Yoga laptop doesn’t charge. It is found that ACDET has a maximum of 7V, and the measured voltage is greater than this voltage. The charging IC must be…

yx
2022-12-10

Laptop Repair Guide

Haier S400 notebook press the power on button and the power indicator does not light up for repair

The heating table heats the main board to about 180, and simultaneously blows welding with an air gun to replace the EC. After cleaning the PCB, power on the standby current of 10mA, power on the machine once, troubleshoot, and finish the maintenance

yx
2022-12-09

Laptop Repair Guide

Lenovo Y430P notebook computer has no response to maintenance by pressing on the key

Save the file, and brush the programmer into UH52. (Note: This synthetic method of ME is only applicable to the 9-line and previous ME)

yx
2022-12-08