LC-46X8E (serv.man8). Troubleshooting Table - Sharp TV Parts Guide (repair manual). Page 16

LC-46X8E/S/RU

4 – 16

                                            
The HDMI signal input from EXT4 doesn’t come out in the display.

MINI AV_UNIT:                    
Is the HOT_PLUG detection signal input to pin (19) of the HDMI 
terminal (SC801) normal?
Is the HOT_PLUG output signal input from pin (18) of HDMI ter-
minal (SC801) to pin (51) of IC803?

NO

Check the between pin (25) of IC803 (HDMI_BUFFER) and pin 
(19) of SC801. (IC807, etc.)

YES

                                             
Check the connection and setup with the external HDMI devices.

Is EDID data accessed from pins (5, 6) of IC802 (EEPROM), and 
is it read from pin (15, 16) of a HDMI terminal (SC801)?

NO

Is access possible in the re-writing or exchange of EDID data of 
IC802?

YES

NO

Check SC801, IC802, IC803 and peripheral circuits.

Is TMDS signal (RXC

± - RX2±) input from EXT4 terminal 

(SC801) to the pins (28/27-35/34) of IC803 (HDMI)?

NO

Check the line between SC801 and IC803.

YES

Is TMDS signal (TXC

± - TX2±) input from the pins (9-1) of IC803 

(HDMI) to pins (12-2) of connector (SC802)?

NO

Check the line between IC803 and SC802.

YES

Is TMDS signal (TMDS6_D0-D2) input into pins (61-68) of 
IC1507 (HDMI_SW)?

NO

Check the line between connector (SC802) and IC1507.
(SC802, SC1503 and Wire harness (HM))

YES

Is switched TMDS signal (TMDS_D0

± - D2±) output from pins 

(11-1) of IC1507?

NO

Is the control signal of IC1507 and IC9101 (CPLD) normal?
(HDMI_SW_INT, HDMI_RST, etc.)

YES

Is switched TMDS signal (TMDS_D0

± - D2±) input to pins (L2-P1) of IC3301 (VIDEO_PROCESSOR)?

YES

NO

Refer to “The picture doesn't appear in all modes.”

Check the line between IC1507 and IC3301.