Samsung KU750D UN78KU750DFXZA Quick Setup Guide

To connect your TV to Wi-Fi, go to Settings > General > Network > Open Network Settings > Wireless, then select your Wi-Fi network and enter the password.
Ensure the TV is plugged in securely and the power outlet is functional. Try pressing the power button on the TV itself. If it still doesn't turn on, unplug the TV for 30 seconds and try again.
Go to Settings > Support > Software Update > Update Now. Ensure your TV is connected to the internet to download the latest updates.
The best picture mode depends on your viewing environment. For most situations, 'Movie' or 'Standard' mode provides a good balance of color accuracy and brightness.
To reset your TV, navigate to Settings > Support > Self Diagnosis > Reset. Enter your PIN (default is 0000) and confirm the reset.
Check that the volume is not muted and increase the volume level. Verify that the TV speakers are selected in Settings > Sound > Sound Output. If using external speakers, ensure they are connected properly.
HDR is enabled automatically when you play HDR content. Ensure that your content source (e.g., streaming service, Blu-ray) supports HDR and is connected via an HDMI port that supports HDCP 2.2.
Check all cable connections to ensure they are secure. Try using a different HDMI cable or port. Update the TV's software and reset the picture settings to default.
Download the Samsung SmartThings app on your smartphone and connect it to the same Wi-Fi network as your TV. Follow the app instructions to add your TV and control it using your phone.
Press the Source button on your remote control, and use the arrow keys to navigate to the desired input source. Press Enter to select it.