If you only receive a few stations after a scan it generally indicates that the reception is weak.
1. Check the TV reception via the MENU. Ref to the user guide.
2. Try doing an AUTO scan at different times of the day to check if you can find any additional channels.
3. Check the antenna connection from the wall plug to the back of the TV. Make sure this is not damaged or loose.
4. You may need to call a qualified antenna technician to look into your areal.