This review of the Samsung UA40B7100 LCD TV was as part of a collection of 5 reviews for the article Eco TVs – how green is your TV?. The 5 reviews have been gathered together in the article 5 eco TVs tried and tested.
The Samsung UA40B7100 LCD TV is quite a mixture. For the most part it is a high-end TV with high-end features, including a super slim panel measuring slightly under 30 mm thick and digital multimedia support via network or USB.
It is highly energy efficient – scoring 5 stars according to Samsung – and this seems to be due to the use of LED backlighting, and specific tuning designed to yield a big score under the rating scheme.
Under the rating scheme, the measurements are conducted with the TV in its initial out-of-the-box condition (pausing only to make any selections forced by the TV’s first start-up processes, and to switch off any ambient light sensor). This TV defaults to ‘Standard’ for the picture setting and this, oddly, had its backlight brightness set to only 5 out of 10. These are normally up around 7 or 8 by default.
Most TVs, like this one, also have a ‘Movie’ or ‘Cinema’ mode and these usually use less power than the default mode. But this TV was brighter in ‘Movie’ mode and used nearly 5 percent more power!
You can save more power by turning down the backlight further, or switching ‘Energy Saving’ to one of three settings: the biggest cuts power by about 25 percent. The ‘Auto’ setting made no particular difference.