I treat myself to one of these (think this is a later model, but pretty much the same telly) a few months back to replace my ageing CRT which was on it's last legs.  Anyway it came with a plethora of connections, 3 HDMIs, couple of SCARTs, but no SVIDEO :(.  It did however have a PC IN connection, which is basically a VGA input. Always had it in my head that SVIDEO would be best, but fortunately it turns out that VGA is better (not as good as HDMI, but sadly my laptop doesn't have one). Anyway got myself a cheap VGA cable from Argos and connected it up, brought up the display settings, and extended the desktop ... and saw a very small section of my desktop on the telly :(

I tried faffing with the telly settings, repositioning the screen, etc and didn't get anywhere.  In fact I went backwards as I ended up with just a blank screen.  Not to be out done I did what everyone with a problem does these days and asked Google :).  Initial hit looked promising but in the end was telling me to do what I was already doing :(! So to get the punchline I had a bit of inspiration and thought perhaps the graphics driver was interferring, so popped up Start > Control Panel > Additional Options > NVIDIA Control Panel, changed the source on the telly to PC and job's a good 'un :).

Of course being VGA only the picture goes to the telly, so for the sound a twin phono to 3.5mm stereo jack from Maplin should do the trick :) Hope this helps someone else out.