Review of the Panasonic Viera TX-40DX700B

This Panasonic TX-40DX700B is a 4K and HDR 40" TV.

• I agree with many of the reviews that this TV has an excellent picture both for DVB broadcasts and content received over the Internet such as Amazon video. 4K content, although limited at the moment, looks great
• Despite being 89.5 cm in width, the arrangement of the legs usefully enables the TV to be placed on a stand which is not so wide. It will actually fit on an 80cm stand (just) although I'd advise a slightly wider stand. To note the legs cannot be moved towards the centre of the 40" TV, unlike the larger models.  
• The TV worked fine at the outset then it became impossible to access any live broadcasts. Pulling out the plug to reset the TV resolved this. This issue hasn't reoccurred
• The TV incorporates a DLNA client in order to render content stored on a DLNA server. Bear in mind that the media server must be DLNA-compliant not just UPNP-compliant. DLNA is fussier than UPNP but I find the DLNA client on this TV reasonably flexible in terms of playing media formats (obviously not as flexible as media player like mplayer). However, see below regarding photos 
• Some observations about DLNA servers
• For users of the open source DVR Mythtv, the DLNA client on the TV is compatible with v.0.28 of Mythtv. As a DLNA server, mythtv is useful for browsing and showing TV recordings. However if you want to watch videos, they are all grouped into one directory which not very useful if you have them grouped into sub-directories
•  The TV also works well with minidlna which is good for browsing directories of videos as (unlike mythtv) the directory structure is preserved 
• The media browser includes a slideshow option for photos. This is surprisingly basic since there are no transitions between the photos (such as crossfade) and the music (if selected) is pretty dire. Only JPEGs are supported and I also found a JPEG edited and exported back to JPEG in Gimp would not display ("File not supported", but a further conversion to JPEG in ImageMagick resolves this issue. kodi, which i have running on a Raspberry pi 2 connected to the TV is much better: you can run music in the background, kodi uses decent transitions and Kodi will play a range of image formats
• The Apps interface is slick but the selection of apps quite limited compared with an Android TV (judging by the reviews). Personally I prioritised the picture quality and screen size over the Smart TV functionality