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yx

yx

  • Joined: 2021-11-01
  • Articles: 558

Lenovo Xiaoxinchao 7000-13 notebook is not powered on for repair.

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After disassembling the test, it was found that the power supply did not pass through the common terminal, and the resistance of the common terminal was measured at 0 ohm. It means that the short circuit caused the protection. After measuring each large inductance and disconnecting each test point, no short circuit was found, so we had to use the burning machine method.

Lenovo Z485 notebook trigger current 0.028 repair

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Lenovo Z485 notebook trigger current 0.028 repair Machine model: Lenovo Z485 notebook Main board number: DALZ2CMB8E0 Lenovo Z485 Notebook Trigger Current 0.028 Maintenance Figure 1 Fault phenomenon: the trigger current of notebook is 0.028. 、 Lenovo Z485 Notebook Trigger Current…

Acer A315-55G notebook maintenance without CPU power supply.

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The resistance of the next 13 pins to the ground is analyzed, and it is found that the short circuit to the ground is 0. Remove the capacitor PC7026 and measure it, and it is found to be a short circuit. Find a 10 Ω resistor and capacitor from the material plate, and measure the resistance of this pin to ground to return to normal.