Read LG 42LG70YD (CHASSIS:LJ83A) Service Manual online
- 20 -
TROUBLESHOOTING
1. Power-Up Boot Fail
Check P800 All
Voltage Level (16V, 12V, 5V)
Check Power connector
OK ?
Replace Power board
Y
N
Y
Check IC803 #4 Pin / L816
Voltage Level 3.3V
Replace IC803/ L816 &
Recheck
Y
N
Check L821
Voltage Level 2.6V
Replace IC809 &
Recheck
Y
N
Check L824
Voltage Level 1.2V
Replace IC810 &
Recheck
Y
N
Check X200 Clock
54MHz
Replace X200
Y
N
Check R154 Clock
33MHz
Maybe BCM3553(2) has troubles.
Y
N
Replace IC101 Flash Memory
N
N
N
Check Micom IC407
Redownload or replace
Click on the first or last page to see other 42LG70YD (CHASSIS:LJ83A) service manuals if exist.