We moved into a new house in Torbay about 6 months ago. There's a UHF aerial on the roof but it wasn't working (no signal detected) so I got an aerial specialist out. He said it was missing a power supply for the masthead amp (which the previous owners probably took with them by accident) so he installed a new one. Initially everything worked fine, but recently I noticed a lot of pixellation on any TVNZ channels (1, 2, 1+1, 2+1, Duke) and now those channels have stopped working at all - I just get a "No signal" message. All other "terrestrial" channels work fine.
This isn't a huge deal because I can still get those channels via the On-demand app, plus I don't watch a huge amount of broadcast TV. However, I'm keen to know what has likely gone wrong.
Before I pay a call-out charge for the aerial specialist, does anyone have any suggestions to troubleshoot?
Thanks,
Martin