LG DR165 Service Manual page 22

No 3.3V
YES
Is there about 3.8V at the IC152 pin 1?
YES
Is there about 4V ~ 5V at the IC152
pin 4?
YES
Check the IC152 and Replace
No 2.5V
YES
Is there about 3V ~ 3.8V at the IC151
pin 1?
YES
Is there about 4V ~ 5V at the IC151
pin 4?
YES
Check the IC151 and Replace
NO
Check D127 on SMPS Board and Replace
NO
Check the 'PWR CTL H' signal from
µ-COM
NO
Check D154 and D127 on SMPS Board
NO
Check the 'PWR CTL H' signal from
µ-COM
3-7