LG C3400 Service Manual page 71

4. Troubleshooting
Checking Flow
Change the FPCB and try again
START
Is the connection of
FPCB with connector on
PCB(CN601) ok ?
YES
Check the connection LCD
module with connector
On FPCB ?
YES
Check the soldering of
CN601 ?
YES
YES
Check the soldering of
EMI filter ?
YES
Does LCD work
properly ?
YES
LCD working
NO
Reassemble FPCB with CN601 connector
NO
Reassemble LCD module with connector on FPCB
NO
NO
Resoldering EMI filter(FL600~FL604)
NO
- 70 -
Resoldering CN601
Replace LCD module