In message , Mark Carver
writes
On 01/07/2010 09:45, Ian Jackson wrote:

When I think of it, I realise that this behaviour is understandable if
the Widescreen Signalling signal is not present on 4:3 pictures.
Presumably, it works by being absent or present, rather than actually
telling the TV whether select 4:3 or 16:9. However, I can see no obvious
reference in the instruction manual warning the user to ensure that the
default zoom should normally be set to 4:3, as I have described.

Is this a quirk peculiar to this particular TV set?

No, my Sony Bravia is the same, I need to set the default AR to 4:3 for
the autoswitching to work correctly in all instances, same for a cheapo
Beko model I've got too, I seem to recall.

Noted. Thanks.

I now recall that, when we got the 'family' Sony 23", I couldn't seem to
get the AR to auto-switch. It does now (at least on the internal DTV
source), so I must have hit on the winning combination in the menu
setting.

However, I don't think it works with external inputs, and certainly not
with a feed from a DTT set-top scart RGB hard disc recorder
component output TV set. But, as the set has separate menus for each
input, I'll check to see if I've missed some option. Is it likely that
you are able to set the AR to auto-switch?
--
Ian