Installation Guide
Tools Needed:
- Phillips screwdriver
- Level
- Tape measure
- Wall mount kit (if wall mounting)
- Power drill (for wall mounting)
Step-by-Step Setup
- Unpack and Inspect: Carefully remove TV from packaging and inspect for any damage during shipping.
- Attach TV Stand: Secure the base stand to the TV using provided screws and ensure it's firmly attached.
- Choose Location: Place TV on a stable, flat surface away from direct sunlight and heat sources.
- Connect Power: Plug the power cord into a grounded electrical outlet.
- Connect External Devices: Connect cable/satellite box, gaming consoles, or streaming devices to HDMI ports.
- Antenna/Cable Connection: Connect antenna or cable line to the RF input for live TV.
- Initial Setup: Turn on TV and follow on-screen instructions for language, network, and channel setup.
Specifications
| Model Number | 55S421 |
| Screen Size | 55 inches |
| Display Type | 4K UHD LED |
| Resolution | 3840 x 2160 pixels |
| Smart Platform | Roku TV |
| Refresh Rate | 60Hz |
| HDR Support | HDR10, HLG |
| Connectivity | 3x HDMI, 1x USB, Ethernet, Wi-Fi |
| Audio | Dolby Audio, 2x 10W speakers |
| Dimensions (with stand) | 48.3" x 29.9" x 9.1" |
| Weight (with stand) | 32.6 lbs |
| Power Consumption | 110W (typical) |
Warranty Information
- Limited Warranty: 1 year parts and labor
- Panel Warranty: 2 years on LCD panel
- Extended Coverage: Optional protection plans available
For warranty service, contact TCL Customer Support at 1-877-300-8837 or visit TCL.com/support
Key Features
4K Ultra HD Resolution
Experience stunning picture quality with four times the resolution of Full HD, delivering incredible detail and clarity in every scene.
Roku TV Smart Platform
Access thousands of streaming channels, free and subscription-based, with an intuitive interface and simple remote control.
HDR Pro
High Dynamic Range technology enhances contrast and delivers a wider range of colors for more realistic and vibrant images.
Direct LED Backlight
Advanced LED backlighting provides excellent brightness uniformity and energy efficiency for superior picture performance.
Dolby Audio
Enhanced audio technology delivers clear dialogue and immersive sound for movies, sports, and music.
Voice Control Compatible
Works with Google Assistant and Amazon Alexa for hands-free control of your entertainment experience.
Roku TV Features Explained
Streaming Channels
Access to 500,000+ movies and TV episodes across thousands of free and paid channels
Search Across Platforms
Search for movies and shows across multiple streaming services with one simple search
Private Listening
Use the Roku mobile app for private listening through your headphones
Live TV Pause
Pause live TV on your antenna input with compatible USB storage
Customizable Home Screen
Arrange your favorite channels and inputs for quick access
Mobile App Control
Use your smartphone as a remote control with the Roku mobile app
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| TV won't turn on | Power cord disconnected, power outlet issue | Check power connections, try different outlet, ensure power button is pressed |
| No picture but sound works | Input source issue, backlight failure | Check input source, adjust picture settings, reset TV |
| No sound | Mute enabled, volume low, audio settings | Check mute function, increase volume, verify audio output settings |
| Wi-Fi connection issues | Network problems, incorrect password | Restart router, re-enter Wi-Fi password, check network strength |
| Remote control not working | Dead batteries, obstruction, pairing issue | Replace batteries, ensure line of sight, re-pair remote |
| Picture quality issues | Signal strength, incorrect settings | Check signal source, adjust picture mode, update software |
Common Error Messages
- No Signal: Check input source and cable connections
- Weak Signal: Reposition antenna or check cable connection
- Network Connection Failed: Check Wi-Fi password and router settings
- Software Update Failed: Check internet connection and retry update
- HDCP Error: Try different HDMI cable or port
- Audio Format Not Supported: Change audio output settings
Manual Downloads
Current Model Manuals
55S421
55-inch 4K Roku TV
65S421
65-inch 4K Roku TV
50S425
50-inch 4K Roku TV
43S425
43-inch 4K Roku TV
Popular Previous Models
55S517
55-inch 4K Android TV
55S405
55-inch 4K Roku TV
55P605
55-inch 4K P-Series
55R617
55-inch 6-Series