Sharp LC-40LE814E/RU Service Manual page 41

Is a CVBS signal input to pin (3) of EXT8 (J505)?
Is CVBS signal sent to pin (AE29/CVBS_IN) of IC3302?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the component video signal input to EXT3 (15pin-D-SUB terminal) go out?
Is it selected "Component" by the Audio setup under Menu-
Setup-Option-Input terminal setting - Input select?
Is a COMPONENT video signal input to pins (1)/PC_R_COM,
(2)/PC_G_COM, (3)/PC_B_COM of EXT3 (SC501)?
Is COMPONENT signal sent to pins (AJ17/PC_R_CM), (AJ16/
PC_G_CM) and (AJ15/PC_B_CM) of IC3302?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the DVI (ANALOG) video signal input to EXT3 (15pin-D-SUB terminal) go out?
Is it selected "PC (RGB)" by the Audio setup under Menu-Setup-
Option-Input terminal setting - Input select?
Are the video signal and the synchronized signal input from pin
(1, 2, 3)/(PC_R, G, B), (14 and 13)/(V, H.Sync) of EXT4 (SC501)?
Are the video signal and the synchronized signal input from pins
(AK17/PC__R) (AK16/PC__G) (AH15/PC__B) and (AK14/
PC_HSYNC) (AJ14/PC_VSYNC) of IC3302 (Digital AV decode &
Main CPU)?
Refer to "The picture doesn't appear in all modes."
[External input EXT2] No picture on the display (8)
Does not the picture of the CVBS signal input to EXT2 go out?
YES
YES
[External input EXT3] No picture on the display (9)
YES
YES
YES
[External input EXT3] No picture on the display (10)
YES
YES
YES
LC-40/46LE814/824E/RU (1st Edition)
NO Check the setting of an external input device that connects with
EXT2.
NO Check the line between J505 and IC3302.
NO Set the "Component".
NO Check the setting of an external input device that connects with
EXT3.
NO Check the line between SC501 and IC3302.
NO Set the "PC (RGB)".
NO Check the connection and setup with the external DVI devices.
NO Check the line between SC501 and IC3302.
5 – 10