Sharp LC-40LE820UN Service Manual page 68

LC-40/46/52/60LE820UN
Is INPUT-3 selected on the input select menu screen?
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).
YES
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
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
Check the panel module.
PC: No external input video [INPUT-3]
No video (4)
NO
Check the line between SC501 and IC3302.
NO
Check IC3302 and its peripheral circuits. (IC3501/IC3502, etc.)
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