NO PICTURE ON THE DISPLAY
·
The
picture doesn't appear in all modes.
MAIN UNIT
Is LVDS signal output from
1st_channel and 2nd_channel of IC U400 in each mode? (A0N/A0P),(A1N/A1P),(A2N/A2P),(A3N/A3P),(CLK1N/CLK1P).
=> NO => Check IC U400 and its peripheral control circuits
If Yes
Is the above-mentioned LVDS signals
output to connector CN750? => NO => Check the line between IC U400 and
CN750.
If Yes
Is LCD controller's control signal
normal? => NO => Control signals BRIGHT_ADJ, INVERTER_ON_OFF, PANEL_VCC_ON/OFF,
and it peels off and whether normality is checked.
If Yes [ PANEL UNIT]
Similarly, is the LVDS signal input
to connector of the panel module?. => No => Wire harness is checked.
If Yes
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