LG -E455 Service Manual page 170

Check the Signal level at TP1 (X600 )
Check the voltage at TP5 , +2.8V?
Check the signal level at TP6 (U601)
Check the signal level at TP4 (FL600)
Check the Antenna Clip TP2 (ANT601)
LGE Internal Use Only
START
Yes
Yes
Yes
Yes
Yes
GPS will work properly
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
No
No
No
- 170 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Replace X600
Replace U601
Replace FL600
Replace ANT601
Only for training and service purposes