J4+ LIGA E DESLIGA E NÃO CARREGA | RESOLVIDO!! 2021

Summary

In this detailed repair tutorial, the technician demonstrates how to fix a Samsung Galaxy J4+ that won’t power on. The video covers diagnosing potential issues with the power button, charge connector, and battery, using tools like a multimeter and heat gun. After testing and cleaning various components, the technician replaces the faulty charge connector, resolving the issue and restoring the phone’s functionality. The video is a great resource for DIY enthusiasts and technicians looking to troubleshoot similar problems in Samsung devices.

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Q & A

What is the main issue with the Samsung J4 Plus in the video?

The main issue is that the phone doesn't power on when the power button is pressed but briefly turns on when connected to the charger, displaying the Samsung logo repeatedly.

What is the first step taken to diagnose the problem?

The first step is to test the power button using a multimeter to check for any issues with the button itself.

Why does the technician think the problem might be related to the battery?

The technician initially suspects the battery might be completely discharged, as the phone shows some power when connected to the charger.

How does the technician check if the power button is working properly?

The technician uses a multimeter to test the power button for continuity. The absence of a short circuit and no beep indicates the power button is functioning correctly.

What is the next step after confirming the power button is not the issue?

After ruling out the power button, the technician disassembles the phone to inspect the motherboard and charging circuit.

What was found on the motherboard during the inspection?

During the inspection, the technician noticed some areas of oxidation on the motherboard, which could have been affecting the phone's charging functionality.

What role does cleaning the motherboard play in the repair process?

Cleaning the motherboard helps to remove any dirt or oxidation that might be interfering with the phone's electrical connections, improving its performance.

How did the technician test the charging circuit after cleaning the motherboard?

The technician connected the phone directly to a power supply to check if the charging circuit was working and whether the phone would power on.

What did the technician conclude after testing the charging circuit?

The technician concluded that the charging connector was faulty and not supplying sufficient power to the phone, causing the issue.

What action did the technician take to fix the issue with the charging circuit?

The technician replaced the defective charging port with a new one, which resolved the problem and allowed the phone to charge and power on correctly.

What is the final outcome of the repair process?

The repair was successful; the phone was fully functional again, with the new charging port allowing the battery to charge properly and the phone to power on.

What advice does the technician give to viewers at the end of the video?

The technician advises viewers to always be patient and methodical when diagnosing phone issues, and to check individual components like the charging port, battery, and power button before replacing major parts.