LG 50PM4700 Service Manual page 34

1. Power-Up Boot Fail Trouble Shooting
Check P1100 All Voltage Level
(17V, 5V, 5V_ST)
Y
Check All Voltage Level
at Bead
Y
Check Voltage Level 3.3V at C1105
Y
Check Voltage Level 1.5V at C1121
Y
Check Voltage Level 1.2V
at C1130
Y
Replace IC103 EMMC Memory
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Only for training and service purposes
N
Check Power connector
N
Replace one of Bead
& Recheck
N
Replace one of IC1100 & Recheck
N
Replace one of IC1105
& Recheck
N
Replace one of IC1102 & Recheck
N
Replace one of IC400 ~ 403
& Recheck
Y
Replace Power board
Y
Check Micom Redownload or
Y
replace
Y
Y
Replace IC100 & Recheck
LGE Internal Use Only