I changed these 6 Samsung TV settings to give the picture quality an instant boost
Briefly

"Many consumers neglect to alter the most basic settings when setting up their TVs. Even if your TV is a few years old, you may have never modified its defaults."
"Eco Mode is designed to limit power usage by attenuating the TV's brightness and reducing its contrast level. A recent study found that enabling Eco Mode saves as little as $7 a year on your electric bill."
Read at ZDNET
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