LG 42LA86 Series Service Manual page 122

Standard Repair Process Detail Technical Manual
symptom
LCD TV
Content
Error
B. Power error _No power
Checking method when power is ON
Established
Revised
Check "power on" pin is high
24 Pin (Power Board ↔ Main Board)
SMAW200-H24S
1 Power on
3 3.5V
5 3.5V
7
GND
9
24V
11 GND
13 12V
15 12V
17 GND
19 GND
21 GND
23 L/DIM0_MOSI
2012. 12 .06
date
date
2 Inverter On/off
4 PWM Dim #1
6 PWM Dim #2
8
GND
10
24V
12 GND
14 12V
16
24V
18 GND
20 GND
22 L/DIMO_VS
24 L/DIM0_SCLK
A19