LC-40LE831E (serv.man17). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 14

LC-40/46LE830E, RU/831E, S

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Is the Hot plug detection function output from pin [19] of the 
HDMI-1 (SC1503) normal?

NO

Check the line between SC1503 and pin [59] of IC1504 (HDMI-
SW).

Is the Hot plug detection function output from pin [19] of the 
HDMI-2 (SC1502) normal?

NO

Check the line between SC1502 and pin [74] of IC1504 (HDMI-
SW).

Is the Hot plug detection function output from pin [19] of the 
HDMI-3 (SC1501) normal?

NO

Check the line between SC1501 and pin [55] of IC1504 (HDMI-
SW).

Is the Hot plug detection function output from pin [19] of the 
HDMI-4 (SC1505) normal?

NO

Check the line between SC1505 and pin [50] of IC1504 (HDMI-
SW).

YES

NO

Check the setting of an external input device that connects with 
HDMI-1/2/3/4.

Is EDID data pins [58/HDMI1_SCL, 57/HDMI1_SDA] of IC1504 
accessed, and is it read from pins [15, 16] of a HDMI-1 
(SC1503)?

NO

Is access possible in the exchange of IC1504?

Is EDID data pins [73/HDMI2_SCL, 72/HDMI2_SDA] of IC1504 
accessed, and is it read from pins [15, 16] of a HDMI-2 
(SC1502)?

NO

Is EDID data pins [54/HDMI3_SCL, 53/HDMI3_SDA] of IC1504 
accessed, and is it read from pins [15, 16] of a HDMI-3 
(SC1501)?

Check the peripheral circuit of SC1501/1502/1503/1505 and 
IC1504.

Is EDID data pins [49/HDMI4_SCL, 48/HDMI4_SDA] of IC1504 
accessed, and is it read from pins [15, 16] of a HDMI-4 
(SC1505)?

YES

Do TMDS signals input to pins [26&27/
HDMI1_CLKNP_222.75MHz, 28&29/HDMI1_D0NP, 30&31/
HDMI1_D1NP, 32&33/HDMI1_D2NP] of IC1504?

NO

Check the line between HDMI-1 (SC1503) and IC1504.

Do TMDS signals input to pins [17&18/
HDMI2_CLKNP_222.75MHz, 19&20/HDMI2_D0NP, 21&22/
HDMI2_D1NP, 23&24/HDMI2_D2NP] of IC1504?

NO

Check the line between HDMI-2 (SC1502) and IC1504.

Do TMDS signals input to pins [8&9/
HDMI3_CLKNP_222.75MHz, 10&11/HDMI3_D0NP, 12&13/
HDMI3_D1NP, 14&15/HDMI3_D2NP] of IC1504?

NO

Check the line between HDMI-3 (SC1501) and IC1504.

Do TMDS signals input to pins [99&100/
HDMI4_CLKN_222.75MHz, 1&2/HDMI4_D0NP, 3&4/
HDMI4_D1NP, 5&6/HDMI4_D2NP] of IC1504?

NO

Check the line between HDMI-4 (SC1505) and IC1504.

YES

Do TMDS signals output from pins [87&86/
SW_TMDS_CLKNP_222.75MHz_, 85&84/SW_TMDS_D0NP_, 
83&82/SW_TMDS_D1NP_, 81&80/SW_TMDS_D2NP_] of 
IC1504 respectively?

NO

Check the IC1504 and peripheral circuits.

YES

Do TMDS signals input to pins [AM9&AL9/
SW_TMDS_CLKNP_222.75MHz, AM10&AL10/
SW_TMDS_D0NP, AM11&AL11/SW_TMDS_D1NP, 
AM12&AL12/SW_TMDS_D2NP] of IC3303 (Digital AV decode & 
Main CPU)?

NO

Check the line between IC3303 and IC1504.

YES

Refer to “Refer to “No picture on the display (1)” or “The sound is not emitted from the Speaker & Woofer though the picture has come out.”