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3.6 LCM fail
3.6.1 LCM no display when power on
Check the LCD FPC connection
is OK, whether the phone
properly reassembled FPC
After change LCD，Check
Display is normal
Check MB schematic of LCD, pathway EMI
device as well as welding supply on the
motherboard to check whether it is normal,
plus welding EMI filter.
Check whether there are other devices
LCD surrounding Weld, check LCD
connector is soldered
White screen or black screen
no display, with bright
N
N
N
N
Change CPU
Y
OK
Y
OK
Y
OK
Y
Plus
welding
Weld
18
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