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3.7 The mobile is frozen
Connected to a computer via a USB
cable, check whether the computer
device manager device pop
Check for 32 KHz signal? That from
26 MHz crystal oscillator divider
Check the 26MHz crystal is normal?
Check the power of memory and CPU is
normal.
The mobile is frozen
N
Y
Y
Y
Check the schematic of memory,
after change memory, check it
again
N
Change CPU
Y
Update software
N
Welding try 26MHz
crystal oscillator
N
After welding, try
again
Welding device
N
and associated
circuits PMIC
Y
Ok
20
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