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The Samsung LN40D550 is a low-end to mid-range 40" 1080p LCD HDTV similar to the 37" Samsung LN37D550.

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Abundance of menu options are clear and easy to navigate - user customization is quickly achieved

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"RGB Mode" greatly improves color quality - optimizes hue for truly vivid picture

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Initial setup is very simple - requires only a phillips screwdriver

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Updated remote control is much more intuitive than previous Samsung LN models - highly functional despite unconventional size/shape

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  • Only 3 words are allowed.

Discoloration may occur with off-axis viewing - prone to many LCD televisions at this price point

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Stock speaker system provides mediocre-quality outputting at best - must be used in conjunction with a 5 or 7-channel speaker system for best results

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60Hz refresh rate is not conducive to fast-moving imagery - action/adventure fans may require a 120Hz model

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High backlight level results in edge blurring - must be kept at 3/4 or lower for sufficient contrast

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  • Only 3 words are allowed.


The Samsung LN40D550 is a low-end to mid-range 40" 1080p LCD HDTV similar to the 37" Samsung LN37D550. Aside from display size, the LN40D550 only offers a couple of improvements over the LN37D550, namely: Wide Colour Enhancer and Eco Sensor technology. Otherwise, the two HDTVs sport similar specs and features, including a 200,000:1 dynamic contrast ratio, USB ports and Ethernet connectivity.

The LN40D550's Wide Colour Enhancer technology is meant to improve colour quality by automatically correcting and enhancing all colour levels for a more vivid, life-like image. Its Eco Sensor allows the LN40D550 to automatically adjust ambient light levels in the room an adjust to ensure optimal brightness and clarity in any condition. Meanwhile, the LN40D550's USB ports allow the LN40D550 to interface with any USB storage device, offering direct playback of video, audio and image files.


  • 40" LCD panel @ 1920 x 1080 (60 Hz)
  • Wide Colour Enhancer
  • QAM cable TV tuner receives unscrambled programs without a set-top box (cable service required)
  • 200,000:1 dynamic contrast ratio
  • AllShare video and music streaming from a DLNA-compatible Windows PC (wireless streaming requires Samsung's Wi-Fi USB dongle)
  • Built-in stereo speakers (10 watts x 2)
  • Anynet+ simplifies control of compatible Samsung components via the HDMI connection (HDMI-CEC)
  • Meets Energy Star requirements
  • Video in: 2 component video, 4 HDMI 1.3, 1 VGA
  • Eco Sensor technology
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