LG F3000 - Page 72

4. TROUBLESHOOTING
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START
No
Power is supplied to
the board?
Yes
Refer to
Power On Trouble
Connection between
FPCB and boards is OK?
No
Reconnect
FPCB
Yes
CN601& CN102
is soldered well?
No
Re-solder the CN601
& CN102
Yes
Paths of LCD control
signals are OK?
No
Re-solder
the EMI filter
Yes
FPCB is OK?
No
Replace the FPCB
Yes
Connection between
FPCB&LCD Module is OK?
No
Resolder
The CN101 of FPCB
Yes
After changing the board,
LCD Display is OK?
No
The board is broken.
Change the board.
Yes
LCD Module is out of order.
Change the LCD Module.
Checking Flow