Lenovo 110-15ISK (LA-D562P REV1.0) Short Circuit Repair

Laptop Model: Lenovo 110-15ISK LA-D562P REV1.0
Fault : Short Circuit
Configuration: Seventh Generation I5 Onboard Memory Independent Graphics Card

　Repair Process:

I think everyone likes to connect large and short machines, because the easy way to find the fault point is to burn the machine. Learn from the field teacher's method and just use flux to apply a little bit on the hot area. The current is limited to 3A.

Turn on the power and carefully observe the changes in the heating area, and you will soon be able to hit it with one blow. The advantage of doing this is that it doesn't hurt your hands. 

           Take out the motherboard and directly short-circuit the B+ to ground value. Use the above method to quickly find the damaged components. Remove the isolation tube and test again to see if there is still a short circuit.

At this time, I started to try my luck. I disconnected all the nodes of B+ one by one. When I disconnected to the second node in the figure below, the value changed.

 

The picture shows a 1.0V main power supply, which is easy first and then difficult.

When the first filter capacitor of the main power supply was removed, the value changed again. It seemed that the culprit was found. The filter capacitor of the main power supply B+ broke down to the ground.

This was because the largest of the three was broken, so I had to replace it with another one. Finally, retest the ground value of all inductors to confirm that there is no problem, and turn on the power.

Happy Repairing !!