LC-40/46/52/60LE820UN
7 – 4
No video (4)
PC: No external input video [INPUT-3]
Is INPUT-3 selected on the input select menu screen?
YES
NO
Select INPUT-3 on the input select menu screen for the right input signal.
Is IC509 (EEPROM) accessed by I2C, with PC connected, to read the DDC_I2C SCL/SDA data?
Check the DDC line and its peripheral circuits. (IC509 and its peripherals).
Are there the video signal inputs at pins (AK16) (G), (AH15) (B) and (AK17) (R) of IC3302 (CPU)?
Are there the VSYNC/HSYNC signal inputs at pins (AJ14) and (AK14) of IC3302?
YES
NO
Check the line between SC501 and IC3302.
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC3302?
LVDS_TX_0_DATA0_P/N (C14/D14), LVDS_TX_0_DATA1_P/N (C15/D15),
LVDS_TX_0_DATA2_P/N (C16/D16), LVDS_TX_0_DATA3_P/N (C18/D18),
LVDS_TX_0_DATA4_P/N (C19/D19), LVDS_TX_0_CLK_P/N (C17/D17),
LVDS_TX_1_DATA0_P/N (A14/B14), LVDS_TX_1_DATA1_P/N (A15/B15),
LVDS_TX_1_DATA2_P/N (A16/B16), LVDS_TX_1_DATA3_P/N (A18/B18),
LVDS_TX_1_DATA4_P/N (A19/B19), LVDS_TX_1_CLK_P/N (A17/B17).
YES
NO
Check IC3302 and its peripheral circuits. (IC3501/IC3502, etc.)
Check the panel module.
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