Interesting that you mention having 3 devices. Having been pointed in the right direction as to setting up "clone" devices by akirby I originally set up 3, (TV/PC choice, Monitor choice (either VGA or DVI), and TV choice, (Ext1, 2, etc))but after thinking about it a little more I changed it to two dropping the Monitor choice as VGA was never going to be used. Maybe that's the key, include the third "level" of input.
Model number is 23PF9956/12 and the link for the manual is
[Link: usersmanualguide.com]. It's 2nd from the bottom, the 3.51mb file, not the 159kb one.
To summarise the input/output buttons on the remote:
PC - first press changes from TV mode to the last PC option chosen, (in other words it remembers whether it was last on either PC-D or PC-A). Further presses cycle between PC-D & PC-A only.
TV - first press changes from PC mode to the last TV input chosen, (again it remembers where it was set when last used). Further presses cycle between:
Tuner - (analogue TV signal. I forgot to mention this above)
Ext1 - Sony Freeview box (digital TV)
Ext2 - Panasonic DVD/VCR player
AV - not used
Doe this give anyone any more ideas or suggestions?