Skyworth 42E68 Instruction Manual page 80

Service Flow Chart
Check the cable input if
it has exactly connected
N
Well connect the cable
OK
Done
N
Change the
mainboard
Done
N
Y
N
Check the current input
Change the main
IC "U101"
OK
Done
Has video but no color
Check the Color / Saturation
in picture menu if it has
decreased to "0"
N
source if it is TV
Y
follow the working guide.
N
Check the DC power
supply of the tuner.
N
Check the L116
N
Change the L116
N
N
Change the
mainboard
-50-
Y
Increase the item
to default "50"
OK
Done
Adjust AGC
OK
Done
OK
Done
OK
Done