Getting the best possible picture from a 4K source requires more than just plugging in an HDMI cable. On Samsung televisions, the feature known as HDMI UHD Color (or Input Signal Plus on newer models) is what unlocks full-bandwidth 4K video signals at 60Hz and higher, complete with HDR color depth. Without enabling this setting, your console or streaming box might default to restricted color spaces, dull contrast, or limited frame rates.
Many viewers encounter frustrating issues like a blank screen, washed-out colors, or disabled HDR when connecting a PlayStation 5, Xbox Series X, or 4K Blu-ray player. This guide walks through exact menu navigation steps across different Samsung Tizen OS generations, explores how to troubleshoot common handshake problems, and details optimal configuration choices for home entertainment setups.
Understanding HDMI UHD Color and Input Signal Plus
High-Definition Multimedia Interface specifications evolve rapidly. Standard HDMI ports process basic high-definition video signals without issue, but pushing 4K resolution at 60 frames per second with 10-bit color requires significantly more bandwidth.
When Samsung TVs ship from the factory, individual HDMI ports often operate in a legacy compatibility mode. This conserves bandwidth for older devices like standard cable boxes or DVD players, preventing signal handshaking failures on older hardware. However, modern sources demand full bandwidth:
- Bandwidth limits: Standard mode limits data throughput, forcing 4K devices down to 30Hz or reducing color chroma subsampling to 4:2:0.
- Color depth: Enabling the feature allows the TV to accept 10-bit or 12-bit color signals, essential for accurate HDR gradients.
- HDR compatibility: Formats like HDR10, HDR10+, and HLG rely on wide color gamuts that cannot pass through restricted HDMI ports.
Samsung updated its terminology on recent models running newer Tizen software versions. If you search your menus and can't find "HDMI UHD Color," look for Input Signal Plus instead. Both settings perform the exact same function.
How to Enable HDMI UHD Color on Your Samsung TV
Navigating Samsung's settings menu varies slightly depending on your TV's age and software version. Follow these step-by-step instructions to turn on high-bandwidth signal processing for your connected devices.
For Newer Samsung TVs (2020–Present Models)
- Press the Home button on your Samsung remote control.
- Navigate left and select Settings, then choose All Settings (represented by the gear icon).
- Select Connection from the left-hand menu.
- Choose External Device Manager.
- Select Input Signal Plus (or HDMI UHD Color on some intermediate models).
- Locate the specific HDMI port your console or media player is plugged into (e.g., HDMI 1, HDMI 2) and toggle the switch to On.
For Older Samsung TVs (Pre-2020 Models)
- Press the Settings button on your remote.
- Scroll to Picture and select Expert Settings.
- Scroll down to find HDMI UHD Color.
- Turn on the switch for the specific HDMI port in use.
- Restart your television and external device to finalize the HDMI handshake.
If the option appears grayed out or inaccessible, make sure the TV is actively switched to that specific HDMI input source before attempting to change the setting.
Choosing the Right HDMI Cable and Port
Even with HDMI UHD Color enabled in your software, physical hardware limitations can bottleneck your video signal. Using an incorrect cable or plugging into a secondary port will prevent true 4K HDR passthrough.
Cable Requirements
- Standard HDMI cables lack the data capacity for 4K HDR at 60Hz or higher refresh rates.
- Premium High Speed HDMI cables (supporting up to 18 Gbps) are required for standard 4K HDR gaming and movie streaming.
- Ultra High Speed HDMI cables (supporting 48 Gbps / HDMI 2.1) are mandatory if you want 4K at 120Hz for gaming consoles like the PS5 and Xbox Series X, or for advanced eARC audio setups.
Port Selection
Check your TV's side or rear panel markings. On many Samsung models, only specific HDMI ports support full HDMI 2.1 specifications. For instance, port HDMI 4 often features dedicated gaming features, variable refresh rate (VRR), and auto low latency mode (ALLM). Always plug high-performance gaming gear into the primary high-bandwidth port.
You can verify official specifications for your specific display generation on the Samsung Official Support Site.
Troubleshooting Common Setup Issues
Enabling high-bandwidth settings sometimes triggers display quirks. Here is how to fix the most frequent problems encountered during configuration.
Black Screen or No Signal After Enabling
If your screen goes black after turning on HDMI UHD Color, the connected cable cannot handle the increased data load.
- Turn off the TV, unplug the external device, and reconnect using a certified Premium or Ultra High Speed cable.
- Alternatively, reset the TV's picture settings for that input by navigating to Settings > Picture > Reset Picture.
Grayed-Out Menu Options
If the toggle switch for HDMI UHD Color cannot be selected:
- Ensure your TV is actively displaying that specific HDMI source. You cannot change individual port settings while viewing the smart TV home screen or live antenna television.
- Disconnect any intermediary audio receivers or soundbars temporarily and plug the source directly into the TV to isolate signal interference.
Flickering or Signal Drops
Intermittent blackouts usually point to cable length issues or loose connections. HDMI signals degrade rapidly over passive copper cables longer than 15 feet. For long cable runs, consider using an active fiber-optic HDMI cable to maintain signal integrity.
Frequently Asked Questions
Do I need to enable HDMI UHD Color for every port?
No. You only need to enable it on the specific HDMI ports connected to 4K devices such as gaming consoles, 4K Blu-ray players, streaming sticks, or PCs. Ports connected to older cable boxes or standard-definition hardware can remain in standard mode.
Will turning on HDMI UHD Color ruin older devices?
No. The setting simply tells the television port to accept high-bandwidth signals. Older devices that only output 1080p or 720p will continue to work normally without any negative impact on picture quality or hardware lifespan.
Why is my screen flickering when playing HDR games?
Flickering during HDR gameplay usually stems from a handshake failure between the console and the TV, or a substandard HDMI cable. Try replacing the cable with a certified Ultra High Speed version and check for software updates under Settings > Support > Software Update.
Does this setting affect audio performance?
HDMI UHD Color focuses strictly on video bandwidth and color depth. However, enabling proper HDMI handshaking is essential if you plan to route high-resolution audio formats like Dolby Atmos to a soundbar or AV receiver via HDMI eARC.
