LC
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37D44E/S/RU-BK/GY
4 – 7
No picture on the display (1)
The picture doesn't appear in all modes.
Is the LVDS signal output from IC3001
(MAIN_MICON)?
LVDS0_P/N(140/141), LVDS1_P/N(137/138),
LVDS2_P/N(134/135), LVDS3_P/N(128/129),
LVDS4_P/N(125/126), LVDS_CP/CN(131/132).
NO
Check IC3001 and its peripheral control circuits.
YES
Is the LVDS signal input to IC8103 (LCD_CONTROL)?
A0+/-(165/164), A1+/-(167/166), A2+/-(169/168), A3+/-
(189/188), A4+/-(191/190), ACK+/-(187/186)
NO
Check the line between IC3001 and IC8103.
YES
Is the control signal of LCD controller normal?
NO
Check the control signal R/L_LINE, U/D_OUT_LINE,
FRAME_LINE, BANK_SEL_LINE, TEMP1/2/3_LINE,
QS_EN_LINE, etc.
YES
Is VCC_3.3V, VCC_2.5V or VCC_1.5V supplied to
IC8103?
NO
Check if IC8402(MULTI_CHANNEL_SYSTEM_POWER_SUPPLY)
and the peripheral power supply circuit are normal.
YES
Are the video signals BR/BG/BB (0_P/M-3_P/M), FR/
FG/FB (0_P/M-3_M/P) and the CLK signals (BCLK_P/
M, FCLK_P/M) output from IC8103?
NO
Check IC8103 and its peripheral circuits.
YES
Are BR/BG/BB (0_P/M-3_P/M), BCLK (P/M) input to
connector SC8201 and FR/FG/FB (0_P/M-3_P/M),
FCLK (P/M) input to connector SC8202?
NO
Check the line between IC8103 and SC8201/SC8202.
YES
Are the gradation signals (VH/VL_247, 191, 159, 63,
31, 0) normally sent from IC8201 (GLAY_LEVEL
_GENERATION) to SC8201/SC8202?
NO
Check IC8201 and that the communication between its peripheral
circuits and IC8103 is normal. (Each line of DAC_CLK/DATA/
LATCH)
YES
Check the connectors SC8201/SC8202 and LCD panel.
