Hitachi 42HDF52A Service Manual page 20

DTV source no signal
Cannot receive any digital channel
Turn the TV off
Is the multi I/O connector
connected with scaler board
Yes
Is the tuner connected
with antenna / cable
connector
Yes
Be sure have done
the channel scan
Yes
Change the tuner module
No
No
Is the signal received
No
No
Is the signal received
No
No
Is the signal received
20
Connect it firmly
been resolved
Connect it firmly
Make auto scan
Yes
Problem has
Yes
Problem has
been resolved
Yes
Problem has
been resolved