LG 43LX340H - Troubleshooting Guide

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LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. Power-up boot check
Check stand-by Voltage.
P401 5, 6p i n : +13.2V
Ch eck 12pi n Power connector
Ma i n B/ D 13. 2V Line
Short Check
Check X101 clock
24 MHz
Replace X101
Ch ec k P 401 P WR _ O N.
1pi n : 3. 3V
Replace Mstar(I C101) or Main board
Check Multi Voltage
P401 7, 8p i n : A 13. 2V
Replace Power Board
Check DRV ON Control
P401 11 pin : High
Ch eck Pow er Board
Ch eck IC405, IC404, IC400, Q 406
Output Voltage
IC405 : 3. 5V
IC404 : 1.5V
IC400 : 1. 1V & 5V
Q 406 : 3. 3V
Replace IC405, IC404, IC400, Q 406
Re-d ow n load soft war e.
Check stand-by Voltage
L 403 : +13. 2V
Replace L 403
Check LVDS Power Voltage
Q 405 : 13. 2V
Replace Q405
Check Mstar LVDS Output
Replace Mstar(IC101) or Main Board
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
okNo
No
ok
Replace Power board.
ok
No
No
No
No
No
No
No
No