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1. Power-Up Boot Fail Trouble Shooting
Check P801 All Voltage Level
(24V, 12V, 5V_ST)
Y
Check All Voltage Level
at L805/L807/L808
Y
Check Voltage Level 3.3V at L830
Y
Check Voltage Level 2.5V at L827
Y
Check Voltage Level 1.8V
at IC802 #2 pin or L815
Y
Check Voltage Level 1.2V at L821
Y
Check X903 Clock 54MHz
Y
Check signal transition
at IC101 #9 pin
Y
Replace IC101 Flash Memory
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Only for training and service purposes
N
Check Power connector
N
Replace one of L805/L807/L808
& Recheck
Replace one of
N
IC809/Q812/L828/L829/L830/L822
& Recheck
N
Replace one of IC803/L824/L827
& Recheck
N
Replace one of IC802/IC805/L815
& Recheck
Replace one of
N
IC804/Q809/L811/L817/L821
& Recheck
N
Replace X903
N
Maybe BCM3556 has troubles
Y
Replace Power board
N
N
Check Micom IC406
Redownload or replace
N
N
LGE Internal Use Only
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