LC-32GD9EK (serv.man10). Troubleshooting Tables - Sharp TV Service Manual (repair manual). Page 14

Is "EXT5" selected with
button on the remote control?

Select "EXT5" with        button 
on the remote control.

Is the type of video signal 
(Signal Type) from HDMI-
connected external device set?

From MENU-Option-HDMI 
Setup-Signal Type, select a 
signal type ("RGB", "YCbCr 
4:4:4" or "YCbCr 4:2:2").

Is the type of colour signal 
(Colour Matrix) from HDMI-
connected external device set?

From Option-HDMI Setup-
Colour Matrix, select a color 
signal type ("AUTO", "ITU601" 
or "ITU709").

Is TMDS data (RX`

± signal) 

sent to pins (1) – (12) of EXT5 
(HDMI) terminal (SC1901)?

Is I2C signal (SDA/SCL signal) 
sent to pins (16) and (15) of 
EXT5 (HDMI) terminal? Check 
external connection and 
peripheral circuits.

Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent from pins (110) –
(144) of IC1905 (HDMI-
RECEIVER)?

Check power supply (3.3/1.8V) 
pins (99) and (74) of IC1905, 
SDA/SCL signal pins (29) and 
(30), and peripheral circuits.

Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (73) – (50) of 
IC3002 (VCT)?

Check SDA3/SCL3 signal pins 
(27) and (28), interface between 
IC1905 and IC3002, and 
peripheral circuits.

Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and (140) - (129) and (128) of IC3002 (VCTP), and is 
CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?

Check pins (192), (170) and 
(133) of BU3.3V power line and 
pins (185), (169) and (142) of 
BU1.8V power line of IC3002 
(VCTP), and peripheral circuits.

Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - (24) and (25) of CONNECTOR CN1 in LCD-
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?

Check CONNECTOR (P2305, 
CN1) and Hareness Wire (LV).

Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?

                                                                    Replace LCD-CONT-UNIT.

No EXT5 (HDMI) output of the 
external input system.

Checklist:
1) Is "INPUT SOURCE" button        on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT5".
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or 
    "YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be “ITU601’ or “ITU709”.)
4) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.

 Check HARNESSWIRE (LV).

 Is IC 1705 supplying LCD 5V?

 Check IC1705 and peripheral parts.

 Change IC1705.

 Is LCD5V supplied to pins (31)  -   

 (28) of  CONNECTOR (P2305)?