Installation Guide
Tools Needed:
- Phillips screwdriver
- Level
- Measuring tape
- Power drill (optional for wall mounting)
- Remote control batteries (AAA x 2)
Step-by-Step Setup
- Unbox and Inspect: Carefully remove all packaging materials and check for any visible damage to the TV and accessories.
- Assemble Stand: Attach the TV stand to the base using provided screws and ensure it is securely fastened.
- Choose Location: Place on a stable, flat surface or mount on wall using VESA 200x200 compatible mount.
- 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.
- Initial Setup: Turn on TV and follow on-screen instructions to connect to Wi-Fi and set up Fire TV account.
- Picture Calibration: Adjust picture settings for optimal viewing experience based on room lighting conditions.
Specifications
| Model Series | 43LF421U21 |
| Display Type | 4K UHD LED |
| Screen Size | 43 inches |
| Resolution | 3840 x 2160 pixels |
| Smart Platform | Fire TV Edition |
| HDR Support | HDR10, HLG |
| Refresh Rate | 60Hz |
| Audio Output | 20W (10W x 2) |
| Connectivity | Wi-Fi, Ethernet, Bluetooth 5.0 |
| HDMI Ports | 3 x HDMI 2.0 |
| USB Ports | 1 x USB 2.0 |
| Dimensions (with stand) | 96.5 x 62.8 x 21.9 cm |
| Weight | 8.2 kg |
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
Fire TV Built-in
Access to thousands of channels, apps, and Alexa skills with the built-in Fire TV experience. Voice control with Alexa included.
4K UHD Resolution
Experience stunning picture quality with four times the resolution of Full HD, delivering incredible detail and clarity.
HDR Support
High Dynamic Range technology provides brighter brights, darker darks, and more vibrant colors for a more realistic viewing experience.
DTS Studio Sound
Enhanced audio technology delivers virtual surround sound from the built-in speakers for an immersive entertainment experience.
Auto Game Mode
Automatically detects when a game console is connected and switches to Game Mode for reduced input lag and smoother gameplay.
Alexa Voice Control
Use your voice to search for content, control playback, adjust volume, and smart home devices with the included Alexa Voice Remote.
Fire TV Features Explained
Live TV Integration
Watch live TV, news, and sports alongside your streaming content with compatible services
Universal Search
Search across multiple streaming services at once to find where your favorite shows are available
Parental Controls
Set viewing restrictions and create profiles for family members with appropriate content access
App Organization
Customize your home screen with favorite apps and channels for quick access to preferred content
Screen Mirroring
Cast content from compatible smartphones, tablets, and computers directly to your TV
Smart Home Control
Use your TV as a smart home hub to control compatible lights, cameras, and other devices
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| TV won't turn on | Power cord disconnected, remote battery issue | Check power connection, replace remote batteries, try power button on TV |
| No picture but sound works | Input source incorrect, backlight issue | Check input source, adjust picture settings, restart TV |
| Wi-Fi connection issues | Router problems, signal interference | Restart router, check signal strength, reconnect to network |
| Remote not working | Battery depletion, pairing issues | Replace batteries, re-pair remote, check for obstructions |
| Audio problems | Volume muted, incorrect audio settings | Check volume levels, audio output settings, external speaker connections |
| Fire TV not responding | Software glitch, memory issues | Restart TV, clear cache, check for software updates |
Common Error Codes
- No Signal: Check HDMI connections and input source selection
- Network Error: Verify Wi-Fi password and router connectivity
- App Crash: Clear app cache or reinstall problematic application
- Update Failed: Check internet connection and available storage space
- Audio Sync Issues: Adjust audio delay settings in sound options
- Picture Quality Problems: Check source quality and adjust picture settings
Manual Downloads
Current Model Manuals
43LF421U21
43" Fire TV 4K UHD
43LF422U21
43" Fire TV HDR
43LF423U21
43" Fire TV Smart
43LF424U21
43" Fire TV Pro
Popular Previous Models
43LF311U21
43" Fire TV 2022
43LF312U19
43" Fire TV 2021
43LF313U18
43" Fire TV 2020
43LF314U17
43" Fire TV 2019