My Freeview box has no EPG, is blank on FIVE, ITV3, ITV4, ITV2+1, has no sound o
To deal with the problem you must clear the channel list completely and then rescan - if your box has it in the menus, please the 'installation menu' to do an initial scan or a reset to factory settings or First Time Installation. You MUST delete the entire existing list of channels. On most boxes this technique can be also be used:
1) unplug your Freeview box (or idTV) from the mains;
2) unplug the aerial from the Freeview box by disconnecting the cable from the 'RF in' socket;
3) wait 30 seconds;
4) plug Freeview box (or idTV) mains back in;
5) do a complete scan for channels - it will fail without the aerial. (This may be in the installation or initialization menu, and is distinct from any 'add channels option'). Once this is done your channel line up should be empty;
6) reinsert aerial by reconnecting to the 'RF in' connection;
7) do a complete scan for channels again.
The Freeview channel line-up provided by six "multiplexes" - each of which carry five or more TV channels, radio channels, text services and EPG data. In this diagram each ROW represents a multiplex. If you are still missing a whole multiplex (ie everything on the row) you may need to replace your aerial with a wideband type, purchase a larger aerial or you may have interference from a VCR, games console, Sky Digibox or similar.
Chris.SE: I have now established that BBC Four HD, BBC News HD and PBS America +One are receivable rather poorly at my location from Crystal Palace COM7. I guess it now means several hours going up and down into the loft to try to get a better/acceptable/functioning COM7 signal.
I only discovered the signal was partially present by MANUAL tuning @ 746MHz.
Possibly you people who give advice might bear in mind that manual tuning reveals things an aerial-out MEGA First time installation tune may not?
Wish me luck with my compass.
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Ah, good, glad you've made some progress. Don't forget sometimes the best signal can be obtained when you are slightly off-bearing. Also it's not just bearing that can be relevant with a loft aerial, a bit backwards or forwards can make a difference, especially if you are trying to minimise multipath from structures as well as trees. Good luck with further manoeuvres!
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