ELECTRONIC EQUIPMENT REPAIR CENTRE : LG 32LCR TROUBLE SHOOTING - NO POWER - NO PICTURE

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TROUBLE SHOOTING

No power

Symptom

1) Front LED is No light

2) The Set doesn’t discharge little

Check process

No picture

Symptom

1) Some mode doesn’t display.

2) Front LED is green

3) The set still discharge a little

Check follow

1) RF-mode doesn't display

Is the LVDS cable connected?	YES	Is the Tuner cable connected?	YES	Are good some elements(C, R, L, or Diode) at path?	YES	Are input voltage, I2C, and CVBS output good in Tuner?	YES	Is VCT-P IC good?
NO		NO		NO		NO		NO
Insert the LVDS cable exactly		Insert the Tuner cable exactly		If it dead or short, exchange this elements		Exchange the Tuner		Exchange the VCTP IC

2) AV/Component-mode doesn’t display

Is the LVDS cable connected?	YES	Are good some elements(C, R, L, or Diode) at path?	YES	Is VCT-P IC good?
NO		NO		NO
Insert the LVDS cable exactly		If it dead or short, exchange this elements		Exchange the VCTP IC

3) RGB/HDMI-mode doesn't display

Is the LVDS cable connected?	YES	Are good some elements(C, R, L, or Diode) at path?	YES	Check the EDID data	YES	Is AD9381 good? (only _ HDMI)	YES	Is VCT-P IC good?
NO		NO		NO		NO		NO
Insert the LVDS cable exactly		If it dead or short, exchange this elements		Download the EDID data		Exchange AD9381 IC		Exchange the VCTP IC

No Sound

Symptom

1) Front LED is Green

2) The Set display a screen, but a sound doesn’t output

Check follow

1) Speaker part

Are Speaker Cables Good?	YES	Are Speaker Cables connect normally?	YES	Are Speaker units good?
NO		NO		NO
Exchange the cable		Insert the cable exactly		Exchange the Speaker unit

2) Main board part

Is sound at Scart1/2 (or Component2)RGB, or Side AV Good?	YES	Are good some elements (C, R, L, or Diode) at Sound path	YES	Is IC800 good? (Switching IC)	YES	Is IC601 good? (VCT-P)	YES	Is IC801 good? (Amplifier)
		NO		NO		NO		NO
		If it dead or short, exchange this elements		Exchange IC800		Exchange IC601		Exchange IC801