Samsung PS42E7SX Service Manual page 101

Troubleshooting
⑤ Address Open, Short(some vertical lines don't exist on screen)
▶ Address Open and Short is related with Logic Main, Logic Buffer, FFC, TCP film and so on.
This page shows you how to check the boards, and the following pages show you how to find the defective board.
[ Logic Main ]
Address Open/Short
Check the LED operation
Check if the internal mode
screen is normal
OK
Reload the data onto the
MICOM and recheck it
Check the detailed waveform
and control the signal waveform
DONE
6-12
NG NG
Check the
Main Board
OK
Check if a specific TCP Block
screen is displayed abnormally
Check if there is an open or
short circuit on the Buffer Board
and the Logic Main address
data output section.
Check the FFC connection status
OK
NG
Replace Logic Main /
Address Buffer (E or F) /
OK
Check the DDR
input voltage (Vref)
OK
NG
Check the DDR Vref
input power and the
Voltage Divider
resistance
NG
FFC
NG
Replace the Panel
Samsung Electronics