Thanks for your message. Unfortunately, this does sound like something that you require a repair. But just so you know, I support US products and customers. So if you want to set it up for service, here's the Samsung Netherlands portal for support on that product: http://www.samsung.com/nl/support/model/UE40B7000WPXXN
Hope this helps you!
I have a Samsung LED TV Series 7 UE40B7000WPXXN bought in the Netherlands 3 years ago (for a fortune).
Unfortunately it just started turning itself off after about 40 minutes watching content, any content (satellite, streaming, DLNA, ...). Then it turns itself back on where it was.
When playing DLNA the whole streaming process gets stopped.
Also, I could not find any firmware upgrade. And I noticed that the pause and forward remote options are not working with DLNA (but used to before...).
Is it dying after 2.5 years?!