LG Electronics 425020, 425030, 425010 service manual RGB PC doesnt display

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RGB PC doesn￿t display

Check J703 ,

Can you see the normal

waveform?

YES

Check the input of RGB Video

switch(IC700) ,

Can you see the normal waveform?

YES

Check the input of RGB Audio

switch(IC1001) ,

Can you see the normal waveform?

YES

Check the output of RGB Audio

switch(IC1001) ,

Can you see the normal waveform?

YES

Check the output of Main IC(IC100).

Especially you should check

The H,V sync and clock.

Can you see the normal waveform?

YES

This board has big problem because Main IC(IC100) have some troubles.

After checking thoroughly all path once again, You should decide to replace Main Board or not.

NO

NO

NO

NO

NO

J703

may have problem. Replace this Jack.

After checking the Power of RGB Video switch, you should decide to replace RGB Video switch or not.

After checking the Power of RGB Audio switch, you should decide to replace RGB Audio switch or not.

After checking the Power of RGB Audio switch you should decide to replace RGB Audio switch or not.

After checking the Power of Main

IC(IC100) you should decide to replace

Main IC or not.

Copyright © 2007 LG Electronics. Inc. All right reserved.

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Contents LCD TV Contents Safety Precautions General GuidanceServicing Precautions Electrostatically Sensitive ES DevicesIC Remove/Replacement General Specification SpecificationSpecification Application RangeModel General Specification RED Chroma & BrightnessMAX / MIN 更多难得资料请到江南家电维修论坛免费下载! http//bbs.520101.com SET Optical Feature Component Video Input Y, PB, PRHdmi Input DTV Hdmi Input PCMechanical specification Main PCB check process Adjustment InstructionApplication Range USB Download Hdmi Total Assembly line processAV SCART1/SCART2/S-VHS/CVBS Calibration Component更多难得资料请到江南家电维修论坛免费下载! http//bbs.520101.com Edid Data Adjusting the White Balance How to adjustGND and resisting pressure test Set the shipping mode In-stopSelect the option by country ISP Download option Adjustment condition Download conditionHow to adjust for downloading How to dowunload USB S/W Download optionTroubleshooting TV/CATV doesnt displayDTV doesnt display AV1/2/3 doesnt display Component doesnt display RGB PC doesnt display Hdmi doesnt display Block Diagram LCD PanelExploded View 更多难得资料请到江南家电维修论坛免费下载! http//bbs.520101.com 更多难得资料请到江南家电维修论坛免费下载! 更多难得资料请到江南家电维修论坛免费下载! http//bbs.520101.com Apr