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With <Component> signal input
No external input video onscreen <INPUT 4>, <INPUT 5>
Is INPUT 4, INPUT 5 selected on the input select menu screen?
Are there the signal inputs from the HDMI (SC402, SC403)
connector to the following input terminals of IC8702 (pin (5), (6),
(8), (9), (11), (12), (14), (15), (16), (17), (19), (20), (22), (23), (25),
(26)).
Are there the clock, H, V, Data signal outputs at pins (70) - (76),
(83) - (90), (96), (98), (99), (104) - (111) of IC8702, respectively?
Are waveforms of the clock, H, V, and Data input and output
terminals of IC8401 normal?
Are there the signal outputs at pins U22, U23, V22, V23, P22,
P23, R22, R23, T22, T23 of IC801, respectively?
Check LVDS cable, LCD controller (IN PANEL) and their periph-
eral circuits.
YES
YES
YES
YES
YES
No video onscreen (6)
NO
Select INPUT 4 or INPUT 5 on the input select menu screen to
pick up the right input signal.
NO
With an HDMI device connected, is IC403, IC404 (EEPROM)
accessed by I2C and is the DDC I2C CLOCK/DATA data read?
Check IC403, IC404 and their peripheral circuits.
NO
Check IC8702, IC8703 and their peripheral circuits.
NO
Check IC8401 and its peripheral circuits.
NO
Check IC801 and its peripheral circuits.
6 – 6
LC-42BX5H/M/X
NO
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