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Cannot power on-low or no current
Check and
replace I/O
NO
YES
Customer Service
Make the phone connect the
power supply and find low or no
Check the battery
connector and power
Upgrade the software
NO
Check the power manage
supply output：
VCCRE 1.8V
VDD 2.8V
AVDD 2.8V
VTCXO 2.8V
VMEM 2.8V
VRTC 1.2V
26MHZ
Check and replace
system clock：
26MHz
Replace or re-weld
Replace U101
MT6250
END
NO
YES
NO
YES
NO
NO
NO
23
Service Manual
，
Clean
Re-weld
or
Replace or
Re-weld
CPU
YES
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