Service manual

4-5

4. Troubleshooting

4-1-3. No Video (Analog PC signal)

Symptom Audio is normal but no picture is displayed on the screen. T

Major

checkpoints

Check the PC source T

Check the Arsenal, Check the Chelsea. T

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. T

Diagnostics

Power indicator LED is off.

Lamp(Backlight) on, no video?

Check the PC source and

check the connection of D-SUB ?

Does the signal appear at

TP - PC_R, PC_G, PC_B, PC_HS, PC_VS

(R, G, B, H, V) ?

Does the digital data appear at

TP-E_TXCLK+, E_TXCLK-,

O_TXCLK+, O_TXCLK-?

Check the LVDS cable?

Check the T-Con B’d?

Replace the LCD panel?

Check a set in the ‘Stand-by mode’

or ‘DPMS mode’.

Input the analog PC signal properly.

Check CN902, PC cable.

Change the Main Assy.

Check IC1102 (SX1).

Change the Main Assy.

Please, Contact Tech support.

Yes

Caution Make sure to disconnect the power before working on the IP board.