LG -E410 Service Manual page 73

Check the pin and battery connect
terminals of I/O connector
Cable voltage 4.8V (for 5.0V)
Check changing IC(U4000) SMT status
Exchange changing IC or change
the Main board and reset.
LGE Internal Use Only
START
Connection OK?
Yes
Is the u-USB
Yes
Is it changing properly
After turning on?
No
by X-ray.
Charger Troubleshoot Flow
No
Change I/O connector
No
Change TA (or u-USB cable)
Yes
END
U4002
- 73 - Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
Only for training and service purposes