ONN 55-Inch Class 4K HDR10+ Smart TV User Manual
Model: 55-Inch Class 4K HDR10+ Smart TV
This product is a renewed item.
Introduction
This manual provides essential information for the setup, operation, and maintenance of your ONN 55-Inch Class 4K HDR10+ Smart TV. This television integrates Roku Smart TV functionality, offering access to a wide range of streaming content and smart home compatibility. Please read this manual thoroughly before using your television to ensure proper and safe operation.
What's in the Box
Carefully unpack all items and ensure you have received the following components:
- ONN 55-Inch Class 4K HDR10+ Smart TV
- Remote Control
- Wall Mount Kit
- Power Cable
- Quick Start Guide (not included in this digital manual)

Image: The ONN 55-Inch Class 4K HDR10+ Smart TV displaying the Roku interface, shown with the included wall mount kit below it.
Setup
1. TV Placement and Wall Mount Installation
Your television comes with a free wall mount for flexible placement. Ensure the wall mount is securely installed on a suitable wall structure capable of supporting the TV's weight (approximately 42.3 pounds). Follow the instructions provided with the wall mount kit for safe installation. Alternatively, the TV can be placed on a flat, stable surface using compatible TV stands (not included).

Image: Various components of the wall mount kit, including the main bracket, mounting hardware, and a small level.
2. Initial Power On and Network Connection
- Connect the power cable to the TV and a power outlet.
- Press the power button on the remote control or TV.
- Follow the on-screen instructions to select your language, country, and connect to your Wi-Fi network. An Ethernet connection is also available for wired internet access.
- Activate your Roku account or create a new one to access streaming services.
3. Smart Home Integration
The ONN Roku TV is compatible with Amazon Alexa, Google Assistant, and HomeKit devices. To integrate, follow the instructions provided by your smart home platform to link your Roku account and discover the TV as a new device.
Operating Instructions
1. Roku Smart TV Interface
The Roku Smart TV interface provides a customizable home screen for accessing streaming channels, inputs, and settings. Navigate using the directional pad on your remote control.

Image: The ONN Roku TV home screen, showing icons for popular streaming services like Netflix, Disney+, Apple TV, Peacock, Roku Channel, and Paramount+.
2. Voice Control
Utilize voice commands through Amazon Alexa or Google Assistant to control your TV. This includes finding movie titles, launching or changing channels, and switching inputs. Voice control is also available via the Roku mobile app.

Image: A graphic illustrating the TV's compatibility with popular voice assistants and smart home platforms, including Apple AirPlay, Apple Home, Alexa, and Google Home.
3. Connectivity
The TV offers multiple connectivity options:
- HDMI: 3 ports for connecting devices like cable boxes, game consoles, or Blu-ray players.
- Composite: 1 port for older video devices.
- USB: 1 port for media playback from USB drives.
- Optical: 1 port for digital audio output to soundbars or home theater systems.
- Coaxial/Cable: 1 port for antenna or cable TV connection.
- Headphone: 1 port for private listening.
- Wi-Fi & Ethernet: For internet connectivity and streaming.
4. Audio Features
The television features Dolby Audio technology delivered through two built-in 8W speakers, providing superior sound quality.
5. Mobile App Control
Control your ONN Roku TV using the free Roku mobile app for iOS or Android. The app allows for quick search, voice control, private listening through headphones, and casting photos or videos from your phone.

Image: Multiple smartphone screens displaying the Roku mobile app interface, showing remote control functions, channel browsing, and voice search capabilities.
Maintenance
To ensure the longevity and optimal performance of your television, follow these maintenance guidelines:
- Cleaning: Unplug the TV before cleaning. Use a soft, dry cloth to wipe the screen and cabinet. Do not use liquid cleaners or aerosol sprays directly on the TV.
- Ventilation: Ensure adequate ventilation around the TV. Do not block ventilation openings.
- Power Cord: Regularly check the power cord for any damage. Do not use a damaged cord.
- Storage: If storing the TV for an extended period, keep it in a cool, dry place, protected from dust and extreme temperatures.
Troubleshooting
If you encounter issues with your TV, refer to the following common troubleshooting steps:
- No Power: Ensure the power cable is securely connected to both the TV and the power outlet. Try a different outlet.
- No Picture/Sound: Check that the correct input source is selected. Verify all cable connections (HDMI, etc.) are secure.
- Remote Not Working: Replace the batteries in the remote control. Ensure there are no obstructions between the remote and the TV's IR sensor.
- Network Connection Issues: Restart your Wi-Fi router. Go to the TV's network settings and try reconnecting to your Wi-Fi network.
- Picture Quality Issues: For 4K content, ensure your source device and HDMI cables support 4K resolution. Adjust picture settings in the TV menu.
For more detailed troubleshooting or persistent issues, consult the Roku support website or contact customer service.
Specifications
Key technical specifications for the ONN 55-Inch Class 4K HDR10+ Smart TV:
| Feature | Detail |
|---|---|
| Brand | ONN |
| Screen Size | 55 Inches (140 cm visible diagonal) |
| Display Technology | LED |
| Resolution | 4K UHD (3840 x 2160) |
| HDR Support | HDR10+ |
| Refresh Rate | 60 KHz |
| Aspect Ratio | 16:9 |
| Connectivity | 3 HDMI, 1 Composite, 1 USB, 1 Optical, 1 Coaxial/Cable, 1 Headphone, Ethernet, Wi-Fi |
| Special Features | Roku Smart TV, Works with Alexa & Google Assistant, HomeKit Compatible |
| Audio Output | 2 x 8W Built-In Speakers, Dolby Audio |
| Product Dimensions (D x W x H) | 10"D x 49"W x 30"H (approx.) |
| Item Weight | 42.3 pounds (approx.) |

Image: A graphic emphasizing the 4K UHD resolution, stating it brings out lifelike color, texture, and detail.

Image: A graphic demonstrating HDR10+ technology, showing a split screen with 'HDR10' on one side and 'Standard Dynamic Range' on the other, highlighting richer colors and contrast.
Warranty and Support
As a renewed product, specific warranty details may vary. Please refer to the seller's return policy and any included warranty documentation for information regarding coverage and duration. For technical support related to the Roku operating system or general TV functionality, visit the official Roku support website or the ONN product support page.
For inquiries regarding your renewed product purchase, please contact the Amazon Renewed customer service or the specific seller, Exclusive Bulbs.





