How to connect a computer and TV via Wi-Fi: a complete guide with troubleshooting steps

Transferring images from your computer to a large TV screen via wireless network — a problem faced by every second Smart TV user. According to research Statista 202668% of modern TV owners use them to stream content from a PC at least once a week. But while the wired connection (HDMI) is perfectly clear, Wi-Fi connection often raises questions: why the picture lags, how to synchronize the sound, which protocols to choose for minimal delays.

This article - not just instructions, and a complete guide covering all the nuances: from choosing the optimal connection method (Miracast, DLNA, Steam Link) to fine-tuning your router to reduce ping. We'll cover current solutions for Windows 11/10, macOS and Linux, as well as compatibility with TVs Samsung Tizen, LG webOS, Sony Google TV And Android TVWe will pay special attention to troubleshooting common errors, such as no sound, connection drops, and poor 4K streaming quality.

If you've previously tried setting up a PC-TV Wi-Fi connection and encountered problems, this article will help you systematically understand the causes. We won't limit ourselves to basic advice like "turn on Wi-Fi on both devices," but will delve into technical details: Which ports should be open, how to check the router's bandwidth, and why Wi-Fi 6 not always better Wi-Fi 5 for video streaming.

1. Connection methods: which one to choose for your needs

Exists 5 main protocols for wirelessly streaming content from a computer to a TV, and each is optimized for specific scenarios. The mistake many users make is trying to use a one-size-fits-all solution. For example, Miracast It's great for low-latency screen mirroring (perfect for gaming), but it's completely unsuitable for streaming 4K movies due to bandwidth limitations. On the other hand, DLNA Allows you to stream media files without duplicating your desktop, but does not support DRM-protected content (Netflix, Disney+).

Here is a comparison table of the methods, indicating their strengths and weaknesses:

For 90% of home users the optimal solution would be a combination DLNA for media files And Miracast/Steam Link for interactive contentIf you have a TV on Android TV (For example, Sony X90J or Xiaomi Mi TV), then built-in support Google Cast Allows you to broadcast Chrome tabs or your smartphone screen without any additional settings.

A critical detail: Samsung TVs running the Tizen platform do not support Miracast directly—they will require an external adapter (such as the Microsoft Wireless Display Adapter) or the use of alternative protocols.

2. Network Preparation: Why Your Router May Be a Bottleneck

Even if you have chosen the correct connection protocol, 70% of broadcast quality depends on your router settings.The main parameters that affect connection stability are:

• 📶 Wi-Fi frequency: 5GHz is required for 4K streaming (2.4GHz does not provide enough bandwidth).
• 🔄 Channel width: 80 MHz or 160 MHz (lags may occur in 40 MHz mode).
• 🔒 Wi-Fi standard: Wi-Fi 6 (802.11ax) preferable Wi-Fi 5 (802.11ac) for simultaneous operation of several devices.
• 📡 Router location: direct line of sight between the router and the TV (concrete or metal walls weaken the signal by 50–70%).

Before setting up a connection, check your current network settings. To do this:

1. Connect to the router at 192.168.0.1 or 192.168.1.1 (indicated on the device sticker).
2. Go to the section Wireless Settings (or Wireless network).
3. Make sure that:
   • Network mode: 802.11a/n/ac/ax (for 5 GHz).
   • Channel width: 80 MHz or Auto 20/40/80 MHz.
   • Channel: Choose the least loaded one (use apps like Wi-Fi Analyzer for Android).

Important for dual-band router ownersIf your TV and computer are connected to different frequencies (for example, your PC to 5 GHz and your TV to 2.4 GHz), this may cause device detection issues. The solution is to force both devices to connect to the same 5 GHz network.

Use 5 GHz band|

Set channel width to 80 MHz|

Enable WMM (Wi-Fi Multimedia) to prioritize traffic|

Disable Power Saving (802.11e)|

Update your router firmware to the latest version-->

⚠️ Attention: If your internet service provider limits your local network speed (for example, some providers have a default limit of 100 Mbps between devices), 4K streaming will be unavailable. Check this in your account or call support.

3. Step-by-step setup of Miracast (screen mirroring)

Miracast — is a wireless screen sharing standard built into Windows 8.1/10/11 and most modern TVs. Its main advantage is no dependence on a router (Devices connect directly using Wi-Fi Direct.) However, there are limitations:

• ❌ Maximum resolution - 1920×1080@60 (4K is not supported).
• ❌ Input signal lag ~30–50 ms (not suitable for shooters, but acceptable for strategy games).
• ❌ No DRM support (Netflix, Amazon Prime Video will block content).

To activate Miracast on Windows:

1. Make sure your TV supports Miracast. Samsung this is a function Screen Mirroring, on LG — Wireless Display, on Android TV — Cast.
2. On your computer, click Win + K (or open Settings → System → Display → Connect to a wireless display).
3. Select your TV from the list of available devices. If it's not there, check if mirroring mode is enabled on your TV.
4. When connecting for the first time, you may be asked to enter a PIN code (displayed on the TV screen).

If Miracast doesn't work:

• 🔹 Update your Wi-Fi adapter drivers on your PC (download from the manufacturer's website, not through Windows Update).
• 🔹 On some laptops (for example, Dell XPS or HP Spectre) Miracast is disabled by default in the BIOS. Enter the BIOS (button) F2/Del at boot) and enable the option Wireless Display.
• 🔹 If you are using a VPN or corporate network, disable them as they may be blocking Wi-Fi Direct.

Why might Miracast not support 4K?

The Miracast standard is based on Wi-Fi Direct technology, which uses real-time video compression. Transmitting 4K@60 requires a bandwidth of ~18 Gbps, while even Wi-Fi 6, under ideal conditions, provides a maximum of 9.6 Gbps (in reality, 3–5 Gbps). Therefore, the Wi-Fi Alliance consortium capped the maximum resolution at 1080p to ensure stability.

⚠️ Attention: On TVs Samsung 2018-2020 (QLED series models) function Screen Mirroring It only works when connected to a 2.4 GHz network, even if the TV supports 5 GHz. This is a firmware limitation—check for updates in the menu. Support → Software Update.

4. Setting up DLNA for streaming movies and music

DLNA (Digital Living Network Alliance) — is a protocol for sharing media files over a local network. Unlike Miracast, it doesn't mirror the screen, but allows the TV to "see" folders containing movies, photos, and music on the computer. Advantages:

• ✅ Support for 4K HDR and 5.1/7.1 sound.
• ✅ No lag (buffering depends only on network speed).
• ✅ Works even on old TVs (2012–2015).

To set up DLNA on Windows:

1. Open Control Panel → Network and Internet → Network and Sharing Center → Advanced Sharing Settings.
2. Turn on Network discovery And File and Printer Sharing.
3. Install DLNA serverBuilt into Windows Media streaming works unstably - it's better to use Plex, Kodi or Serviio.
4. In the server settings, specify the folders with media files (for example, D:\Films or C:\Users\Public\Videos).
5. On your TV, open the app Media player, SmartShare (LG) or Video (Samsung) and select your PC from the list of devices.

If the TV does not see the computer:

• 🔹 Check that both devices are on the same subnet (IP addresses should differ only in the last digit, e.g. 192.168.0.100 And 192.168.0.101).
• 🔹 Disable Windows Firewall or add a port exception 1900 (UPnP) And 8200 (DLNA).
• 🔹 If you use Plex, make sure it is enabled in the server settings DLNA server (Settings → DLNA).

5. Steam Link for Gamers: How to Play on the Big Screen

If you want to play Steam- games on TV with minimal lag, Steam Link — the best solution. Unlike Miracast, it supports:

• ✅ Resolution up to 4K@60 (with sufficient network speed).
• ✅ 7.1 sound and gamepad support (including DualSense And Xbox Controller).
• ✅ Optimization for DirectX 12 and Vulkan (less lag in new games).

Setup instructions:

1. Install the application Steam Link on TV (available in Google Play Store for Android TV or App Store for Apple TV).
2. On your PC, open Steam, go to Settings → Login and turn it on Steam Guard (required for remote connection).
3. On the menu Settings → Remote Access activate Enable streaming.
4. Launch Steam Link on your TV, select your PC from the list and enter the PIN (displayed in Steam on your computer).
5. For best quality, in the Steam Link settings, select:
   • Quality: Premium (4K)
   • Network Settings: Speed ​​Priority
   • Encoder: NVENC (if you have an NVIDIA graphics card)

To reduce latency (critical for shooters):

• 🎮 Connect the gamepad directly to the TV (via Bluetooth), not to the PC.
• 🖥️ On PC in Steam turn it off Enable hardware acceleration for encoding, if artifacts are observed.
• 📡 Use a wired connection from your PC to the router (even if your TV is connected via Wi-Fi).

6. Troubleshooting: lags, no sound, connection breaks

Even with proper setup, common issues may arise. Here's how to solve them:

If the problem persists, check event logs on the router. To do this:

1. Go to the router's web interface (192.168.0.1).
2. Go to the section Logs or System log.
3. Look for errors like Wireless disassociation or DHCP lease failed - they will indicate the reason for connection breaks.

⚠️ Attention: On TVs LG webOS (2021-2023 models) An error may occur when using DLNA "Format not supported" for files with an audio track DTS-HD MASolution: Convert the audio to AC3 or E-AC3 by using FFmpeg.

7. Alternative Solutions: When Standard Methods Don't Work

If none of the above methods work (for example, you have an older TV without Smart TV or specific latency requirements), consider these alternatives:

1. Google Chromecast / Amazon Fire TV Stick

• 🔹 Connects to your TV's HDMI port and allows you to stream your PC screen via Google Cast or Fire TV Mirroring.
• 🔹 Supports 4K HDR and Dolby Vision/Atmos sound.
• 🔹 Latency ~100–200 ms (not suitable for gaming, but great for movies).

2. NVIDIA GameStream settings (for NVIDIA graphics cards)

• 🔹 Works only with series video cards GTX 650 and newer.
• 🔹 Latency ~10–20 ms (better than Steam Link for shooters).
• 🔹 Requires an app NVIDIA Shield on TV or Android TV.

3. Wired connection via Powerline adapter

• 🔹 Uses electrical wiring to transmit the Internet (speed up to 1 Gbps).
• 🔹 Ideal if Wi-Fi is unstable due to thick walls.
• 🔹 Adapter examples: TP-Link AV1000, Devolo Magic 2.

For owners MacBook or iMac the best option would be Apple AirPlay:

1. Make sure your TV supports AirPlay 2 (e.g. LG OLED C2 or Sony X95K).
2. On Mac, open Control Center → Screen Mirroring and select TV.
3. To stream media files, use iTunes or Apple TV app.

8. Network optimization for minimal latency

If you are setting up a connection for games or professional use (for example, editing video on a large screen), the standard router settings will not be enough. Here advanced recommendations:

1. Setting up QoS (Quality of Service)

• Find the section in your router QoS or Traffic prioritization.
• Add a rule for the TV's IP address with the highest priority.
• Limit the bandwidth for other devices (e.g. smartphones) to 10 Mbps.

2. Using the Mesh system

• If the TV is located far from the router, a Mesh system (for example, Google Nest Wi-Fi or TP-Link Deco) will provide a stable signal without losses.
• Place the Mesh nodes so that the TV is within the coverage area of ​​the main node.

3. Manual DNS assignment

• Set DNS on your PC and TV 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google).
• This will reduce delays when accessing streaming servers (Netflix, YouTube).

4. Disabling energy-saving functions

• On PC in Control Panel → Power Options select a scheme High performance.
• In the Wi-Fi adapter settings, disable the option Allow the device to turn off to save power.

To check the current network characteristics, use the command in Command line Windows:

ping 192.168.0.1 -n 50

If response time > 10 ms or there is packet loss, a problem with the router or interference.

FAQ: Answers to Frequently Asked Questions

Is it possible to connect a TV to a computer via Wi-Fi without a router?

Yes, if both devices support Wi-Fi Direct or MiracastFor example, on Windows, click Win + K and select your TV from the list. Please note that in this mode, internet access on the TV will not work.

Why is there no sound when connecting via Miracast?

This is a typical driver issue. Update the Wi-Fi adapter and sound card drivers on your PC. If you are using a discrete graphics card (NVIDIA/AMD), NVIDIA Control Panel or Radeon Settings select the audio output device HDMI.

How to mirror your Mac's screen to a Samsung TV?

Televisions Samsung do not support AirPlay directly. Options:

• Use Apple TV (connects to the TV HDMI port).
• Install the application on Mac AirParrot or Reflector for broadcasting via Miracast.
• Connect Google Chromecast to the TV and broadcast via Google Cast.

What is the minimum Wi-Fi speed required for 4K?

4K@30 HDR streaming required 25–30 Mbps, for 4K@60 — 50–60 MbpsPlease note that this is real The speed between devices, not the internet connection speed. Check it with iPerf3 or in the router menu.

Is it possible to play online games (CS2, Fortnite) via Steam Link?

Technically yes, but input lag (~30–50 ms) will make competitive shooters uncomfortable to play. For online gaming, it's best to use:

• Wired connection of PC to TV (HDMI).
• NVIDIA GameStream with adapter NVIDIA Shield (delay ~10 ms).
• Gaming monitor with low input lag instead of TV.