No Picture On The Display - Sharp LC-40LE820E Service Manual

LC-40/46/52LE820E, LC-40/46LU820E
Is the LVDS signal output from IC3302 (DIGITAL_AV_DECODER_&_MAIN_CPU_&_VIDEO PROCESSER) respectively?
LVDS0_D0N/P (D14/C14), LVDS0_D1N/P (D15/C15), LVDS0_D2N/P (D16/C16), LVDS0_CLKN/P_83MHz (D17/C17), LVDS0_D3N/P (D18/C18),
LVDS0_D4N/P (D19/C19), LVDS1_D0N/P (B14/A14), LVDS1_D1N/P (B15/A15), LVDS1_D2N/P (B16/A16), LVDS1_CLKN/P_83MHz (B17/A17),
LVDS1_D3N/P (B18/A18), LVDS1_D4N/P (B19/A19)
Is the above-mentioned LVDS signal output to connector P2601?
Similarly, is LCD controler's control signal normal?
PANEL_UNIT:
Is the LVDS signal input to connector LW of the panel module?
Check the panel module.
Is the video signal (TUNER_CVBS) output from pin (16) of
TUNER (TU1101)?
Is the video signal (TUNER_CVBS) sent to pin (AD29/
TU_CVBS) of IC3302 (Digital AV decode & Main CPU)?
Refer to "The picture doesn't appear in all modes."
Refer to "No sound (during the reception of TV (DIGITAL) broadcasting)."

No picture on the display (1)

The picture doesn't appear in all modes.
YES
YES
YES
YES
No picture on the display (2)
Does not the picture come out when VHF/UHF is received?
YES
YES
No picture on the display (3)
Does not the picture come out when DTV is received?
Check IC3302 and its peripheral control circuits.
(IC2002, IC3501, IC3502, X3302, etc.)
NO Check the line between IC3302 and P2601.
NO Please check each control signal of DET_POW (DET_PNL12V),
PE. (PNL_EN)
NO NO Wire harness (LW) is checked.
NO Check the tuner and its peripheral circuits.
Replace as required.
NO Check the line between TU1101 and IC3302. (Q1106, etc.)
7 – 7
NO