Service manual

4 Troubleshooting

SyncMaster 150T 4-3

4-3 No Video [Digital]

Check TFT-LCD panel and inventer.

Check signal cable connection.

Does the digital video signal appear at the

Pin 37, 38, 39, 40, 41, 42, 45, 46, 47, 48 of IC600?

Yes

Check IC701 and related circuit.

Does the input signal appear at the

Pin 27, 28, 30, 31 and 32 of IC600?

(DHS, DVS, DEN, DCLK, LVDS-EN)

During Power on-off, does the signal appear

at the Pin 63, 64, 65, 66 of IC501?

Check IC501 and related circuit.

Yes

Check IC600 and related circuit.

Yes

Check PC and related circuit.

Check IC706 and related circuit.

Check IC301 and related circuit.

Check IC701 and related circuit.

Does the digital video signal appear at

R314, R315, R316, R318, R319, R320, R321,R322?(IC301)

RX2+, RX2-, RX1+, RX1-, RX0+, RX0-, RXC+, RXC-

Is the Pin 1, 19 of IC701 High?

Does the sync signal appear at the output

Pin 14, 18 of IC706? (HSYN_IN, VSYNC_IN)

Is the input signal Pin 9 of IC301 high? (TMDS-EN)

Do the clock, DE, sync signal appear at Pin 44, 46, 47,of

and 48 of IC301? (T_DCLK, T_DE, T_VSYNC, T_HSYNC)

and does the digital video signal appear at

T_RED (7:0), T_GRN (7:0),and T_BLUE (7:0)?