Samsung A51 SM-A515 Power On/Off & Volume Keys Problem Solution | Keypad Jumper & Hardware Repair

Samsung A51 SM-A515 may face power button not working, volume keys unresponsive, or intermittent key issues due to broken tracks, connector faults, or damaged keypad IC.
This video provides a complete hardware solution, including keypad ways, jumper repair, and voltage testing.
Follow this step-by-step guide to restore full functionality of power and volume keys on Samsung A51 SM-A515.

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✅ 30 Step-by-Step Repair Guide

Power off Samsung A51 SM-A515.

Remove back cover and disconnect battery.

Unscrew and remove mainboard carefully.

Inspect power button connector pins.

Clean connector with IPA.

Inspect volume keys connector pins.

Test power key line with multimeter.

Test volume key lines for continuity.

Jumper broken power key track if necessary.

Jumper broken volume key track if required.

Inspect keypad IC solder joints.

Reflow IC if outputs missing.

Test key functionality with battery connected.

Check connector pins for corrosion.

Replace damaged keypad connector if needed.

Inspect surrounding resistors and capacitors.

Jumper any open track lines.

Test each key individually.

Reflow solder points near key IC.

Inspect keypad IC for water damage.

Clean corroded pads if found.

Reassemble mainboard temporarily.

Connect battery and power ON.

Test power button functionality.

Test volume up and down keys.

Check key response under long press.

Reassemble all screws and connectors.

Confirm all keys work correctly.

Test under normal phone operation.

Final assembly and full testing of all keys.

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