Itel S25 Ultra Power On Off & Volume Keys Problem Solution | Button Ways | Strip Testing
Автор: Mobile hardware solutions
Загружено: 2026-01-30
Просмотров: 15
Описание:
This video shows the complete Itel S25 Ultra power on/off and volume keys problem solution, covering:
Power button not working
Volume up/down keys unresponsive
Keys stuck or broken
Button strip disconnected or damaged
Motherboard line or IC faults
The board-level repair tutorial includes button FPC/strip inspection, continuity testing, diode/filter checking, voltage tracing, jumper solutions, and connector repair.
Designed for mobile repair technicians for step-by-step professional hardware repair.
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🔧 30 Step-by-Step Repair Instructions
Power off Itel S25 Ultra
Remove SIM tray
Heat and remove 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 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 line
Check button grounding path
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 burned
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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