LG M6100 Service Manual - Page 78

START, LCD Module is out of order., Change the LCD Module.

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4. TROUBLE SHOOTING Checking Flow START Power is supplied to the board? Yes Connection between FPCB and boards is OK? Yes CN601& CN102 is soldered well? Yes Paths of LCD control signals are OK? Yes No Refer to Power On Trouble No Reconnect FPCB No Re-solder the CN601 & CN102 No Re-solder the EMI filter 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. - 79 -

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4. TROUBLE SHOOTING
- 79 -
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