Since our area went digital(Belmont) about 3 weeks ago I have a problem with my newest TV .The set is a Philips 26PFL 7532D . I receive about 105 chanels, but when you switch the set off you have to reinstall everything again as it doesnt appear to store them When running is shows signal strenth as good,swich off and it shows poor signal-immediately go through the re-install and it shows signal strenth as good and back to the 105 channels-Any ideas?