LC-46/52E77U
6 – 7
<HDMI input> No video (6)-2
HDMI: No external input video [INPUT-6]
HDMI: No external input video [INPUT-8]
Is INPUT-6 selected on the input select menu screen?
Is INPUT-8 selected on the input select menu screen?
YES
NO
YES
NO
Select INPUT-6 on the input select menu screen for the
right input signal.
Select INPUT-8 on the input select menu screen for the
right input signal.
Does the HOT PLUG detection function?
Does the HOT PLUG detection function?
Does the DDC5V signal come from pin (18) of SC1801 to pin (32) of
IC1801 (HDMI_SW2)?
Does the DDC5V signal come from pin (18) of SC1802 to pin (42) of
IC1801 (HDMI_SW2)?
YES
NO
YES
NO
Check the line between the input terminals of SC1801
and IC1801.
Check the line between the input terminals of SC1802
and IC1801.
Check IC1801 and its peripheral circuits
(SDA1: pin53 of IC1801/SCL1: pin54 of IC1801, etc.).
Check IC1801 and its peripheral circuits
(SDA1: pin53 of IC1801/SCL1: pin54 of IC1801, etc.).
Does the HPD signal come from pin (31) of IC1801 to pin (19) of
SC1801?
Does the HPD signal come from pin (41) of IC1801 to pin (19) of
SC1802?
YES
NO
YES
NO
Check the line between the pin (31) of IC1801 and the
pin (19) of SC1801.
Check the line between the pin (41) of IC1801 and the
pin (19) of SC1802.
Check IC1801 and its peripheral circuits
(SDA1: pin53 of IC1801/SCL1: pin54 of IC1801, etc.).
Check IC1801 and its peripheral circuits
(SDA1: pin53 of IC1801/SCL1: pin54 of IC1801, etc.).
Are there the TMDS signal inputs at pins (65/66) (CLK-/+), (67/68)
(D0-/+), (69/70) (D1-/+), (71/72) (D2-/+), all of IC1801?
Are there the TMDS signal inputs at pins (11/12) (CLK-/+), (13/14)
(D0-/+), (15/16) (D1-/+), (17/18) (D2-/+), all of IC1801?
YES
NO
YES
NO
Is IC1801 (pin29/pin30) accessed by I2C, with HDMI
connected, to read the DDC_I2C SDA/SCL data?
Is IC1801 (pin39/pin40) accessed by I2C, with HDMI
connected, to read the DDC_I2C SDA/SCL data?
NO
NO
Check the DDC line and its peripheral circuits.
(IC1801 and its peripherals).
Check the DDC line and its peripheral circuits.
(IC1801 and its peripherals)
Are there the TMDS signal inputs at pins (19/20) (CLK-/+), (21/22) (D0-/+), (23/24) (D1-/
+), (25/26) (D2-/+), all of IC1605 (HDMI_SW1)?
YES
NO
YES
Check IC1801, IC1605 and their peripheral circuits.
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001?
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).
NO
Check IC8001 and its peripheral circuits.
(IC8152/IC8153, etc.)
YES
Check the panel module.
