I have only had Virgin broadband and TV box a few days. It was installed by the engineer , all good. The other night i was watching and pressed a button on my TV remote by mistake, i don’t know which one. the TV went to Roku, i couldn’t change using the Virgin remote - it didn’t respond. Using my TV remote i pressed source thinking it would show the HDMI i was using but it said TV /unknown HDMI (this is ticked) /pc on TV/connection guide/remote key guide/universal remote. What do I choose?