LG -A290 Service Manual page 95

START
Does the SIM card
Support 1.8V or 3V ?
Yes
Is Voltage at the TP1
1.8V or 3V?
Yes
Change the
SIM Card and try
again.
Does it work
Properly?
Yes
SIM card is
properly working
LGE Internal Use Only
No
Change the SIM Card.
This phone supports 1.8V or 3V SIM card.
No
Is Voltage at the TP
1.8V or 3V?
NO
Resolder U0
Redownload SW.
No
Does it work
Properly?
Yes
SIM card is
properly working.
- 95 -
4. TROUBLE SHOOTING
Is Voltage at the TP3
1.8V or 3V?
No
Change the U101
If NOT
No
Change the main board
Copyright © 01 LG Electronics. Inc. All right reserved.
Only for training and service purposes