Lenovo i909 Manual de mantenimiento - Página 10
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I908 Mobile Phone Maintenance Manual
3.1.2 The LCD backlight does not come on
backlight
LCD
inactive
Check the FPC and the main
board connection. Re-connect
and try again
N
Check
for
such
problems as pseudo soldering
and bridging at the ports of the
t
R
LCD
N
Check whether the output of
backlight circuit is above 9V.
N
Replace L1502 or U1508 and
check for the soldering at
Page 10
LENOVO
soldering
Y
ld
d
Y
Y
OK
OK
Replace LCD
M d l
OK