Read LG 32LH70YD (CHASSIS:LJ91D) Service Manual online
1. Power-Up Boot Fail Trouble Shooting
Replace Power board
N
Y
Check Micom IC406
Redownload or replace
Check P801 All Voltage Level
(24V, 12V, 5V_ST)
Check Power connector
Y
Check Voltage Level 3.3V at L830
N
Replace one of
IC809/Q812/L828/L829/L830/L822
& Recheck
Y
N
Check Voltage Level 2.5V at L827
N
Replace one of IC803/L824/L827
& Recheck
N
Y
Check Voltage Level 1.8V
at IC802 #2 pin or L815
N
Replace one of IC802/IC805/L815
& Recheck
N
Y
Check Voltage Level 1.2V at L821
N
Replace one of
IC804/Q809/L811/L817/L821
& Recheck
N
Y
Check X903 Clock 54MHz
N
Replace X903
Y
Check signal transition
at IC101 #9 pin
N
Maybe BCM3556 has troubles
Replace IC101 Flash Memory
Y
Check All Voltage Level
at L805/L807/L808
N
Replace one of L805/L807/L808
& Recheck
Y
Click on the first or last page to see other 32LH70YD (CHASSIS:LJ91D) service manuals if exist.