Installation Guide
Tools Needed:
- Phillips screwdriver
- Level
- Measuring tape
- Power drill (for wall mounting)
- Cable management clips
Step-by-Step Setup
- Unbox and Inspect: Carefully remove TV from packaging and inspect for any damage during shipping.
- Attach Stand: Secure the TV stand to the base using provided screws and ensure it's firmly attached.
- Choose Location: Place 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 HDMI cables for gaming consoles, streaming devices, or sound systems.
- Antenna/Cable Connection: Connect coaxial cable for antenna or cable TV service.
- Initial Setup: Follow on-screen instructions to connect to Wi-Fi and set up Fire TV account.
- Picture Calibration: Use built-in calibration tools to optimize picture quality for your viewing environment.
Specifications
| Model Series | 50LF421U21 |
| Display Type | 4K UHD LED |
| Screen Size | 50 inches |
| Resolution | 3840 x 2160 pixels |
| Smart Platform | Fire TV Edition |
| HDR Support | HDR10, HLG |
| Refresh Rate | 60Hz |
| Audio Output | 20W (2 x 10W) |
| Connectivity | 3 x HDMI, 2 x USB, Ethernet, Optical Audio, RF Input |
| Wireless | Wi-Fi 5, Bluetooth 5.0 |
| Dimensions (with stand) | 112.5 x 71.5 x 23.5 cm |
| Weight | 12.8 kg |
| Power Consumption | 85W (typical) |
Warranty Information
- Full Warranty: 1 year parts and labor
- Panel Warranty: 2 years on LCD panel
- Extended Coverage: Optional protection plans available
For warranty service, contact Toshiba Customer Service at 1-800-631-3811 or visit Toshiba.com/support
Key Features
4K UHD Resolution
Experience stunning picture quality with four times the resolution of Full HD, delivering incredible detail and clarity for all your content.
Fire TV Built-in
Access over 1 million movies and TV episodes, plus thousands of channels, apps, and Alexa skills directly from your TV.
Dolby Vision HDR
Enjoy enhanced contrast, color, and brightness with Dolby Vision HDR that brings entertainment to life with spectacular image quality.
Alexa Voice Control
Use your voice to launch apps, search for content, control smart home devices, and more with the included Alexa Voice Remote.
REGZA Engine 4K
Toshiba's advanced picture processing technology upscales HD content to near-4K quality and optimizes color and contrast.
Auto Game Mode
Automatically detects gaming content and switches to Game Mode for reduced input lag and smoother gameplay.
Fire TV Features Explained
Live TV Picture-in-Picture
Watch live TV while browsing other content in a small window
Universal Search
Search across multiple streaming services with one query
Parental Controls
Set viewing restrictions and purchase pins for family safety
Smart Home Dashboard
View and control compatible smart home devices on your TV
App Store
Access to thousands of apps including Netflix, Prime Video, Disney+
Screen Mirroring
Mirror your phone, tablet, or computer screen to the TV
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| TV won't turn on | Power issue, remote battery dead | Check power connection, replace remote batteries, try power button on TV |
| No picture/sound | Input selection, cable issues | Check input source, verify cable connections, restart TV |
| Wi-Fi connection issues | Signal strength, router problems | Move router closer, restart router, check network settings |
| Remote not working | Batteries, pairing issues, obstructions | Replace batteries, re-pair remote, ensure clear line of sight |
| Apps not loading | Internet connection, app cache | Check internet speed, clear app cache, restart Fire TV |
| Picture quality issues | Signal quality, settings incorrect | Check signal strength, adjust picture settings, update firmware |
Common Error Codes
- No Signal: Check input source and cable connections
- Network Error: Verify Wi-Fi password and connection
- App Crash: Clear app cache or reinstall application
- Update Failed: Check internet connection and storage space
- Audio Sync Issue: Adjust audio delay in sound settings
- HDCP Error: Check HDMI cable and source device compatibility
Manual Downloads
Current Model Manuals
50LF421U21
50" Fire TV 4K UHD
50LF422U21
50" Fire TV Pro
50LF423U21
50" Fire TV Gaming Edition
50LF424U21
50" Fire TV with HDR10+
Popular Previous Models
50LF311U21
50" Fire TV 2022 Model
50LF221U19
50" Fire TV 2021 Model
50LF141U18
50" Fire TV 2020 Model
50LF621U19
50" 4K Fire TV OLED