Introduction
This manual provides essential information for setting up, operating, and maintaining your VIZIO M558-G1 M-Series Quantum 55-inch 4K HDR Smart TV. Please read these instructions carefully before using your television to ensure proper functionality and safety.

Package Contents
Verify that all items are present in the box:
- VIZIO M558-G1 M-Series Quantum 55-inch 4K HDR Smart TV
- Power Cable
- Remote Control
- TV Stands (2)
- Stand Screws
- Batteries for Remote Control
Physical Setup
Attaching the Stands
- Carefully place the TV screen-down on a soft, clean surface to prevent damage.
- Align each stand with the corresponding slots on the bottom of the TV.
- Secure the stands using the provided screws. Ensure they are tightened firmly.

Wall Mounting (Optional)
If you choose to wall mount your TV, refer to the wall mount kit's instructions for proper installation. Ensure the wall mount is compatible with the VESA mounting pattern of your VIZIO M558-G1 TV.
Connecting Your TV
Power Connection
Connect the power cable to the AC IN port on the back of the TV, then plug the other end into a working electrical outlet.
External Devices
Your VIZIO M558-G1 TV offers various ports for connecting external devices:
- HDMI Ports: For high-definition video and audio from devices like Blu-ray players, game consoles, and cable/satellite boxes.
- USB Port: For connecting USB storage devices to view photos or play media files.
- Audio Out (Optical/Analog): For connecting external sound systems or soundbars.
- Ethernet Port: For a wired internet connection.
- Antenna/Cable In: For connecting an antenna or cable TV feed.

Initial Setup and SmartCast
First-Time Setup Wizard
Upon first power-on, the TV will guide you through an initial setup process. This includes selecting your language, connecting to a network (Wi-Fi or Ethernet), and scanning for channels.
Using the Remote Control
The included remote control provides access to all TV functions. It features dedicated buttons for popular streaming services, input selection, volume, channel control, and menu navigation.

SmartCast Home and Apps
VIZIO SmartCast 3.0 provides access to a wide range of streaming applications and content. Navigate the SmartCast home screen to find your favorite movies, TV shows, and music.

Voice Control Integration
The VIZIO M558-G1 supports voice control through compatible devices with Alexa, Google Assistant, and Apple HomeKit. This allows for hands-free control of your TV, such as powering on/off, changing inputs, or launching apps.
Apple AirPlay and Chromecast Built-in
Stream content directly from your Apple devices using AirPlay 2 or cast content from compatible apps on your smartphone or tablet using Chromecast Built-in. Ensure your device and TV are connected to the same Wi-Fi network for these features to function.
Picture and Audio Settings
Adjusting Picture Modes
Your TV offers several picture modes to optimize viewing for different content:
- Calibrated: Recommended for general viewing, providing accurate color and brightness.
- Calibrated Dark: Suitable for darker viewing environments.
- Vivid: Enhances brightness and color saturation for a more dynamic picture.
- Other modes may include Game, Computer, etc.
Access these settings through the TV's menu to customize your viewing experience.
Audio Options
Adjust audio settings such as bass, treble, balance, and surround sound options through the TV's audio menu. If using an external sound system, ensure the TV's audio output is correctly configured.
Power Management
QuickStart vs. Eco Mode
The TV features different power modes:
- QuickStart: Allows the TV to power on faster and keeps SmartCast apps readily available. This mode consumes more standby power.
- Eco Mode: Reduces standby power consumption but may result in a longer startup time for the TV and SmartCast applications.
To change the power mode, navigate to Menu > System > Power Mode on your TV.
Maintenance
Cleaning the Screen and Cabinet
- Screen: Gently wipe the screen with a soft, dry, lint-free cloth. For stubborn marks, lightly dampen the cloth with water or a specialized screen cleaner. Avoid harsh chemicals.
- Cabinet: Use a soft, dry cloth to wipe the TV cabinet. Do not use liquid or aerosol cleaners directly on the TV.
Software Updates
Your VIZIO TV may receive automatic software updates to improve performance and add new features. Ensure your TV is connected to the internet to receive these updates. You can also manually check for updates in the TV's system settings.
Troubleshooting
If you encounter issues with your VIZIO M558-G1 TV, refer to the following common solutions:
- No Power: Ensure the power cable is securely connected to both the TV and the electrical outlet. Test the outlet with another device.
- No Picture/Sound: Verify that the correct input source is selected. Check all cable connections to external devices.
- SmartCast Apps Not Loading/Slow: Check your internet connection. If using Eco Mode, switch to QuickStart mode (Menu > System > Power Mode).
- Remote Not Working: Replace the batteries in the remote control. Ensure there are no obstructions between the remote and the TV's IR sensor.
- Poor Viewing Angle: While the TV offers a wide viewing angle, extreme angles may show slight color or contrast shifts. Adjust your viewing position for optimal picture quality.
For more complex issues, consult the VIZIO support website or contact customer service.
Product Specifications
| Feature | Specification |
|---|---|
| Brand | VIZIO |
| Model Number | M558-G1 |
| Screen Size | 55 Inches |
| Display Technology | QLED |
| Resolution | 4K (3840 x 2160) |
| Refresh Rate | 120 Hz |
| Aspect Ratio | 16:9 |
| Item Weight | 35.7 Pounds |
| Product Dimensions (D x W x H) | 10.04" x 48.59" x 30.6" |
| Connectivity Technology | Ethernet, HDMI, USB |
| Special Feature | Flat Screen, Smart TV |
| Color | Black |
Energy Information
The VIZIO M558-G1 TV is designed for energy efficiency. Refer to the Energy Guide label for estimated yearly energy costs and consumption details.

- On-mode power consumption: 0.49 watts
- Visible screen diagonal: 55" / 140 cm
Customer Support
For further assistance, warranty information, or to report issues not covered in this manual, please visit the official VIZIO support website or contact their customer service department. Keep your model number (M558-G1) and serial number ready when contacting support.