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connector J501 whether
Inspect
disconnected, damaged?
2013-10-18
YU220 service manualV1.0
Does not
boot
-
no
current
Check the battery
Weld, dirty, damaged?
N
Boot
FPC
N
Check whether the FPC
welding OK?
N
Reweld or
replace U501
Huawei secrets, no dispersion without permission
Y
Replace J501
is
Replace FPC
Y
Y
Reweld
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