Installation Guide
Tools Needed:
- Phillips screwdriver
- Level
- Measuring tape
- Power drill (optional for wall mounting)
- Cable management ties
Step-by-Step Setup
- Unbox and Inspect: Carefully remove the TV from packaging and inspect for any damage during shipping.
- Assemble Stand: Attach the TV stand using provided screws and ensure it's securely fastened.
- 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 your antenna or cable box to the appropriate input.
- Initial Setup: Follow on-screen instructions to connect to Wi-Fi and set up your Fire TV account.
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 (2 x 10W) |
| Connectivity | Wi-Fi, Ethernet, Bluetooth 5.0 |
| Ports | 3x HDMI 2.0, 1x USB 2.0, Optical Audio, Ethernet |
| Dimensions (with stand) | 96.5 x 61.5 x 21.8 cm |
| Weight | 8.2 kg |
| Power Consumption | 65W (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.
HDR Support
High Dynamic Range technology provides greater contrast and color accuracy, making colors appear more vibrant and realistic.
Alexa Voice Control
Use your voice to launch apps, search for content, control smart home devices, and more with the included Alexa Voice Remote.
DTS Studio Sound
Advanced audio processing creates virtual surround sound from the built-in speakers for a more immersive viewing experience.
Auto Game Mode
Automatically reduces input lag when gaming consoles are detected, providing smoother gameplay and faster response times.
Fire TV Features Explained
Voice Search
Find movies, TV shows, and apps quickly using voice commands with Alexa
Live TV Integration
Watch live TV and streaming content together in one unified guide
Smart Home Control
Control compatible smart home devices like lights and thermostats
Parental Controls
Set viewing restrictions and create profiles for family members
Screen Mirroring
Mirror content from compatible smartphones and tablets
Regular Updates
Automatic software updates with new features and improvements
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| TV won't turn on | Power cord disconnected, power outlet issue | Check power connections, try different outlet, ensure remote has batteries |
| No picture but sound works | Input source incorrect, backlight issue | Check input source, adjust picture settings, restart TV |
| Wi-Fi connection issues | Weak signal, router problems, incorrect password | Move router closer, restart router, re-enter Wi-Fi password |
| Remote not working | Dead batteries, pairing issues, obstruction | Replace batteries, re-pair remote, ensure clear line of sight |
| Audio problems | Volume muted, incorrect audio settings, cable issues | Check volume, verify audio settings, inspect audio cables |
| Apps not loading | Internet connection, app cache, software issue | Check internet, clear app cache, update software |
Common Error Messages
- No Signal: Check input source and cable connections
- Network Connection Error: Verify Wi-Fi/Ethernet connection and restart router
- App Not Responding: Force close app and restart, clear app cache
- Insufficient Storage: Delete unused apps or clear app data
- Update Failed: Check internet connection and retry update
- Remote Disconnected: Re-pair remote following on-screen instructions
Manual Downloads
Current Model Manuals
43LF421U21
43-inch Fire TV 4K UHD
43LF422U21
43-inch Fire TV Pro
43LF423U21
43-inch Fire TV Gaming Edition
43LF424U21
43-inch Fire TV with HDR10+
Popular Previous Models
43LF311U21
43-inch Fire TV HD
43LF312U19
43-inch Smart TV
43LF320U20
43-inch 4K TV
43LF321U21
43-inch LED TV