Acer Predator PT315 laptop repair, it works from the battery and does not work from the charger

In this video, we repair the motherboard of the Acer Predator PT315-52 laptop
The motherboard for this laptop is coded FH52M LA-J891P Rev 0.1
The problem with this laptop is that it runs on the battery and does not run on the charger!
Before starting the repair process, we have attached illustrative (anatomical) pictures of the most important circuits on this motherboard, including the voltage values ​​and the correct impedances for these circuits.
First, we connected the charger to the motherboard and made sure that the charging socket was safe. We moved on to trace the path of the voltage all the way to the first input mosfet, where the voltage was present on one end and did not pass through the other end.
We immediately checked the mosfet and it was fine
When measuring the voltage needed to operate the Mosfet on the gate of the first Mosfet, we found that it was not available! Thus, we have identified the cause of the problem or malfunction
Let us then move to the general diagram of this motherboard for the purpose of analyzing this circuit and understanding why this signal does not appear
After analyzing the circuit and making the necessary measurements, we found that there was no signal important for the purpose of the operation of this circuit, which is the ACDET signal. After tracking this signal and knowing its source and conditions, the cause of the malfunction was discovered and repaired in a roundabout way due to the lack of alternatives. The device returned to working perfectly, and it was examined and confirmed that all its functions worked. thanks to God .
We wish you an enjoyable and beneficial viewing
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