LC-32XL8E (serv.man4). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 16

LC-32XL8E/S/RU, LC-37XL8E/S/RU

4 – 16

                                            
Does not the picture of the HDMI signal input to EXT4 go out?

MINI AV_UNIT:                    
Is the HDMI detection function output from pin (19) of the HDMI 
terminal (SC1503) normal?

NO

Check between SC1503 and IC1507 (HDMI_SW) of pin (56).
(IC1508, etc.)

YES

Is EDID data pin (6)/SCL, pin (5)/SDA of IC1505 (EEPROM) 
accessed, and is it read from pin (15), (16) of a HDMI terminal 
(SC1503)?

NO

Is access possible in the re-writing or exchange of EDID data of 
IC1505?

YES

NO

Check the circumference circuit of SC1503, IC1505 and IC1507.

Is TMDS signal input into pin (59,58)/TMDS3_CLK , (62, 61)/
TMDS3_D0

±, (65, 64)/TMDS3_D1±, (68, 67)/TMDS3_D2± of 

IC1507 from SC1503?

NO

Check the line between SC1503 and IC1507.

YES

Is each signal output from pin (10,11)/TMDS_CLK_P/N,  (7,8)/
TMDS_D0_P/N,  (4,5)/TMDS_D1_P/N,  (1,2)/TMDS_D2_P/N,  
(77,78)/SDA_SINK/SCL_SINK, (79)/DDC5VOR_A of IC1507?

NO

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

YES

Is each signal of IC3301 (VIDEO_PROCESSOR) pin (L1, L2)/TMDS_CLK_P/N, (M1, M2)/TMDS_D0_P/N, (N1, N2)/TMDS_D1_P/N, (P1, P2)/
TMDS_D2_P/N, (T11, U11)/SDA_SINK/SCL_SINK, (T10)/DDC5VOR_A input?

YES

NO

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

Check the line between SC1101 and IC3301.