LG DR165 Service Manual page 25

No 1.8V(Main Core Vcc)
YES
Is the VCC (2V) supplied to Q154 Emitor?
YES
Is there about 2V ~ 2.5V at Q154 Base
and IC154 pin 4?
YES
Is the VCC (3.3V) supplied IC154
pin 1, 2, 8 ?
YES
Check IC154 and Replace
NO
Check D155 and 2.5V power
NO
NO
3-10
supply
Check Q159 and Replace
Check 3.3V power supply