Samsung A16 Power Button & Volume Keys Problem Solution | Button Strip | Jumper Solution

Описание: This video shows the complete Samsung A16 power button and volume keys problem solution, including:

Power button not responding

Volume up/down keys not working

Keys stuck or unresponsive

Flex strip damage

Motherboard input line or IC issues

The board-level repair tutorial includes button FPC/strip inspection, continuity testing, filter and diode checking, voltage tracing, jumper solutions, and connector repair.
Designed for mobile repair technicians for step-by-step professional hardware repair guidance.

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🔧 30 Step-by-Step Repair Instructions

Power off Samsung A16

Remove SIM tray

Heat and open back cover

Disconnect battery connector

Remove mid-frame screws

Inspect power button strip

Inspect volume up/down key strip

Test FPC flex continuity

Replace damaged button strip if torn

Clean connector with IPA

Inspect connector pins for bending or corrosion

Apply pressure and test button

Check motherboard button input line

Measure pull-up voltage on key lines

Check grounding path of buttons

Test series diode/filter on button line

Replace open/damaged SMD components

Reflow cold solder joints on FPC connector

Test buttons with multimeter continuity mode

Check CPU input if buttons unresponsive

Reflow CPU IO pad if required

Replace flex connector if damaged

Test strip with new flex if needed

Partially reassemble phone for testing

Test power key long press

Test volume up/down keys

Verify consistent key response

Fully assemble phone

Run QC test for buttons

Deliver phone after full testing

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