Asus VM510L notebook maintenance without charging

Asus VM510L notebook does not charge, magnifying glass observes that one end of PR8815 resistor link PR8814 is corroded, and the voltage is normal after adding some solder, so replace it with a good PR8814. Bare-metal test starts charging for 20 minutes, everything is normal, troubleshooting, and maintenance is over.

Machine model: ASUS VM510L notebook

Main board number: X555LD 3.6

Malfunction: The notebook does not charge.

Maintenance process:

An ASUS VM510L notebook, the fault description is used, so the notebook will not be charged.

At the beginning of plugging in, the charging current is 0.9. When the power is turned on, it will not be charged immediately. This happens several times.

Asus VM510L notebook maintenance without charging figure 1

Dismantle the machine, visually check that the machine has been cleaned of dust, unplug the battery and start it automatically.

Bare board test, battery multimeter measurement, power-on automatic trigger, public electricity is normal.

Asus VM510L notebook without charging maintenance Figure 2

Open the bitmap to find the charging chip, and measure the voltage of pin 6. Unplug the battery, plug it back in, and measure that there is 2.59V voltage on pin 6, but there is no voltage in less than 5 seconds.

Test resistor PR8815 has no voltage, and one end of PR8814 is 19V and the other end is 0V. At first, PR8814 was normal with 19V at one end and 3.3 at the other.

Asus VM510L notebook without charging maintenance Figure 3

Observe that one end of the resistor of magnifying glass PR8815 is corroded by PR8814, and the voltage is normal after adding some solder. Replace it with a good PR8814.

Bare-metal test starts charging for 20 minutes, everything is normal, troubleshooting, and maintenance is over.