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cannot download
cannot download
Check
switch on or not
Check
USB cable, software is
OK or not
Check I/O connector is
OK or not
Check C0342 have VBAT
supply or not
Re-solder or replace
U0100 SC7710
phone
can
NO
YES
applications,
NO
YES
YES
NO
NO
YES
END
IQ449 service manual
Check battery is OK or not
Re-install USB driver and
replace USB cable
Re-solder or replace I/O
connector
Check U0100 is OK or not
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