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2. No picture, but sound is normal.
Check if current channel that
OSD displays is normal or not?
HDMI
Check
if
N102(KEY)
is normal or
not?
Check N101 and its power circuits
Yes
USB
Check
if
5V
supplied for USB
channel
is
normal or not?
No picture, but sound is normal.
Are LOGO and OSD normal?
TV/AV/VGA/
YPbPr
Check if signal
input is normal or
not?
Switch
to
TV
channel,
check
power
supply,
I2C
BUS
and
pin12/13 output
of TUNER chip
are
normal
or
not?
No
Check LVDS
connection
Check if power voltage of
panel backlight and backlight
control pin X301-6# (3V) are
normal or not?
No
Yes
Power board
PANEL
has problem
problem.
has
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