Table of Contents
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Cannot power on-current swing instability
NO
Check and
replace the I/O
connector
NO
YES
Customer Service
Make the phone connect the power
supply and find the current swing at
Upgrade the
Check the power manage
supply output：
VCCRE 1.8V
VDD 2.8V
AVDD 2.8V
VTCXO 2.8V
VMEM 2.8V
VRTC 1.2V
YES
26MHZ Check and
replace system
clock：26MHz
NO
Replace or re-weld
NO
Replace U101
MT6250
END
NO
NO
Replace or
Re-weld CPU
NO
22
Service Manual
YES
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