LC-52/60/70LE640U,C6400U (1st Edition)
6 – 10
No video (4)
PC: No external input video [INPUT-8]
Is INPUT-8 selected on the input select menu screen?
YES
NO
Select INPUT-8 on the input select menu screen for the right input signal.
Is IC1504 (HDMI switch) accessed by I2C, with PC connected, to read the VGA_SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC1504 and its peripherals).
Are there the video signal inputs at pins (AK15) (G), (AK13) (B) and (AM15) (R) of IC3303 (CPU)?
Are there the VSYNC/HSYNC signal inputs at pins (AM13) and (AL13) of IC3303?
YES
NO
Check the line between SC501 and IC3303.
Is the T-CON PWB connected?
VBO_HTPDN (40pin), VBO_LOCKN (39pin) of P2604 become Low if there is no problem
in the connection.
NO
Check the panel module and harness.
YES
Are the V-By-One signal input to the pin of P2604?
VBO/- (36/37pin), VBO/- (32/33pin),
VBO/- (28/29pin), VBO/- (24/25pin).
NO
Check IC3303 and its peripheral circuits.
(IC3501/IC3502/IC3503, etc.)
YES
Check the panel module and harness.
