Troubleshooting Guide, No Power | LG Electronics LCD 782LS specification

TROUBLESHOOTING GUIDE

1. NO POWER

	NO POWER
	(POWER INDICATOR OFF)
	CHECK J801	NO	TROUBLE IN
	INPUT VOLTAGE	NO	TROUBLE IN
	INPUT VOLTAGE		BULT-IN POWER
	(12V) ?		BULT-IN POWER
	(12V) ?
	YES
	CHECK J801	NO	TROUBLE IN
	5VST VOLTAGE	NO	TROUBLE IN
	5VST VOLTAGE		BULT-IN POWER
	(5V) ?		BULT-IN POWER
	(5V) ?
	YES
	CHECK
	U501’s PIN 6.	NO	TROUBLE IN
	IS THIS PIN		U501 or X501
	OSCILLATED?		U501 or X501
	OSCILLATED?
	YES
	TROUBLE
	SOMEWHERE ELSE
		- 12 -

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LG Electronics LCD 782LS service manual Troubleshooting Guide, No Power

Contents

Color Monitor Chassis NO. CL-29 Factory Model LB782G Contents Specifications Precaution Be Careful Electric Shock Timing Chart Video Sync Operating Instructions Front View Rear ViewMenu Button Auto Button Wiring Diagram Disassembly Back Cover Removal Block Diagram GM5020 Description of Block Diagram Block Diagram Power Board Adjustment Adjustment for White BalanceAdjustment Start Adjustment for Edid Troubleshooting Guide No Power No Raster Pulse ? No Clock Clock Generator Trouble in DPM Printed Circuit Board Main Board Component Side Power Board Component Side Power Board Solder Side Exploded View Exploded View Parts List Description Replacement Parts List Alternative Parts Transistor Power Board Control Board PIN Configuration Pin Name Function Schematic Diagram Lvds Micom DC/DC Connector Control Power Jun