LG FH2 Service Manual page 21

NO POWER PROBLEM
No power problem occurs when you power on in AC power cord off status. (No Display)
1-3. Battery
1-3-1. Solution
Replace Battery on set bottom place.
1-3-2. How to troubleshoot (Countermeasure)
1) AC power plug off.
2) Please check AC/DC JACK4 pin5 voltage.
If 11~14 V voltage doesn't come out, check soldering status JACK4 and cable.
3) Please check AC/DC CON1 pin5 voltage.
If 11~14 V voltage doesn't come out, Check soldering status CON1.
4) Please check F1 Fuse. If it is opened, please replace it.
5) Finally you must check battery status. And change battery.
1-3-3. Service hint (Any picture/ Remark)
ONE POINT REPAIR GUIDE
JACK4 JACK4
< MAIN circuit >
F1 F1
BATTERY BATTERY
JACK JACK
< SMPS circuit >
3-4
CON1 CON1