Samsung A36 A366 repair, not charging, unresponsive, OVP replacement

🛠 Difficulty: 🟢🟡⚪️

⏰ Repair time: 60 minutes.

So, another Samsung A36 came in for repair.

The phone itself works normally, but there is absolutely no response when a charger is connected.

First thing we do is measure the voltage on the charging lines with a multimeter and confirm that power is reaching the motherboard.

This means the charging port and connectors - which very often fail - are fine in this case.

Remove the motherboard from the housing.

From the back side, using a microscope, through the opening in the metal shield we can see that there are issues with the OVP (Over Voltage Protection) chip.

We cut out a small section of the metal shield to gain access to the chip and see that it is completely burned out.

If you touch it with tweezers, it simply falls off - which is exactly what happened.

It came off together with part of the burned contacts underneath.

This is what the burned OVP chip looks like.

Even the solder balls from underneath it have come out.

Fortunately, the board itself remained intact, so the charging issue can be fixed.

We restore the burned contacts and install a new chip using a soldering station.

Temporarily install the motherboard back into the housing for testing.

The smartphone charges normally in all modes.

We perform final tests, and the device is ready to be fully reassembled.