No Power (Main Board) - LG 31MU97 Service Manual

2. No Power (Main Board)

Is 3.3V at IC702 output
voltage?
Y
Is 3.3V at IC706 output
voltage?
Y
Is 1.2V at IC701 output
voltage?
Y
Is 1.2V at IC707 output
voltage?
Y
Is 112MHz of X200/X300
f requency ?
Y
Change IC205 Serial f lash
memory
DC-DC converter block
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
N
Change IC702 and check
N
Change IC706 and check
N
Change IC701 and check
N
Change IC507 and check
N
Change X200/X300 and
check again.
Crystal
again.
again.
again.
again.
Crystal
- 10 -
DC-DC converter block
LGE Internal Use Only