does anyone have a manual for Sony tv kv-m2151u?

I've recently got a 2nd hand sony tv model no. kv-m2151u and have worked out how to tune the stations in, but can't work out how to get the video tuned in to it (the main channels are running through the video, so I know the link must be working, but we can't see the video menu) I've tried using different channels etc.

The remote is RM826 and has buttons on both sides

If anyone can help asap I'd be extremely grateful!

Thanks