Samsung gt s7562 Samsung Galaxy S Duos S7562 Key Not Working Solution

Samsung gt s7562 Samsung Galaxy S Duos S7562 Key Not Working Solution Schematic, Diagram,Circuit 

Samsung gt s7562 Samsung Galaxy S Duos S7562 Key Not Working Solution Step By Step

Step1

Power KEY

Press Power Key

Step 2

Check the P/K
Soldering State
It is OK ?

Resoldering the P/K FPCB

Step 3

Check
R714

Resolder or Replace
R714

Step 4

Re-check the P/K
FPCB STATE
It is OK ?

Change P/K FPCB

Step 5

Check
ON_SW

Resolder or Replace
UCP300

Step  6

Change main PBA

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