Since adding my soundbar, (maybe even before as not really tried it before) I seem to have lost all HD channels on Freeview on my Panasonic TV. Only settings I made were changing the speaker output from TV to Home theatre. I tried retuning the channels but that made no difference. No channels are showing on the guide from 101 to 199 on Freeview - if I try to choose any channel in the 100+ range, I get an 'invalid channel' message. The other TV upstairs still has the HD channels. When checking the signal on most channels, I’m getting around 80% of signal quality and 0% of signal strength. Any ideas what could be causing this?