Why your phone can't find your LG TV via Wi-Fi – a full breakdown of the causes and solutions

You are trying to stream video from your phone to LG Smart TV through Wi-Fi Direct, Miracast or Google Cast, but the devices stubbornly "don't see" each other? The problem is familiar to many—according to service center statistics, up to 30% of requests for setup LG TV are related specifically to network detection errors. The causes may lie in TV settings, router settings, or even smartphone settings.

In this article we will look at all possible failure scenarios - from the banal disconnected Wi-Fi on your TV to IP address conflicts on your local network. You'll receive diagnostic checklists, step-by-step instructions with screenshots (for popular models) LG OLED, NanoCell And QNED), as well as a table of wireless protocol compatibility. We'll pay special attention to the pitfalls—for example, why iPhone may not see LG TV even with the correct settings, and Android- smartphones sometimes require manual entry of the IP address.

Let us warn you right away: if your TV was released before 2017, some functions (for example, Wi-Fi Direct) may be missing or work with limitations. In this case, you will need to use external adapters or alternative connection methods.

1. Check the basic conditions: Wi-Fi, power, and compatibility

Before delving into the settings, make sure you meet the minimum connection requirements. Experience shows that in 40% of cases, the problem is resolved at this step.

What should be included:

• 📶 Wi-Fi on TV: go to Settings → Network → Wi-Fi connection and check the status. On models LG 2020+ the network icon is displayed in the upper right corner of the main screen.
• 📱 Wi-Fi on a smartphone: not only turned on, but also connected to the same network, as well as the TV. For example, if the TV is connected to MyWiFi_5G, and the phone is to MyWiFi_2.4, the devices will not see each other.
• 🔌 Power saving mode: on some Android-phones (for example, Samsung or Xiaomi) Aggressive battery optimization may block local network scanning. Disable it for apps. LG TV Plus or Google Home.

Protocol compatibility: LG Smart TV support different wireless transmission standards depending on the year of manufacture:

⚠️ Attention: If your TV is connected to the router via cable (Ethernet), and the phone - via Wi-Fi, some functions (for example, Miracast) may not work. In this case, use Wi-Fi Direct for direct connection.

2. Router settings: why they block detection

The router is a key link in the chain. Even if the TV and phone are connected to the same network, incorrect settings can "isolate" the devices from each other. Let's look at the main culprits:

Problems at the router level:

• 🔒 Client Isolation (AP Isolation): If this feature is enabled, devices on the same network cannot see each other. Disable it in the router's admin panel (section Wireless → Advanced).
• 🌐 Different subnets for 2.4 GHz and 5 GHz: some routers (eg. ASUS RT-AX88U) separate networks into different VLANs. Make sure both devices are connected to the same subnet (e.g. 192.168.1.x).
• 🔄 DHCP server: If your TV has a static IP and your phone has a dynamic IP (or vice versa), conflicts may occur. We recommend using DHCP for both devices.
• 🛡️ Firewall or parental controls: some routers (eg. Keenetic) block multicast traffic required for Miracast And Google Cast.

How to check:

1. Open your router's control panel (usually at 192.168.1.1 or 192.168.0.1).
2. Go to LAN → DHCP Settings and make sure that the IP address range is sufficient (eg. 192.168.1.100–192.168.1.200).
3. In the section Wireless → Professional turn it off AP Isolation And Client Isolation.
4. Save the settings and reboot the router.

⚠️ Attention: If you use guest network On the router, the devices in it are isolated from the main network by default. Connect your phone and TV to main network.

Client Isolation (AP Isolation) is disabled

TV and phone are on the same subnet (e.g. 192.168.1.x)

The DHCP server is enabled and issues IP addresses automatically.

The firewall does not block multicast traffic (port 1900 for DLNA)

-->

3. LG TV settings: what could go wrong

LG Smart TV are known for their finicky network stack, especially on firmware versions older than 2021. Let's look at the key settings worth checking.

Where to look for problems:

• 📡 Wi-Fi Direct mode: On models before 2020, it must be turned on manually. Go to Settings → Network → Wi-Fi Direct and activate the function. On new TVs (LG OLED C2 and newer) it turns on automatically when scanning.
• 🔄 Firmware update: Outdated software may not support modern protocols. Check the version in Settings → General → About TV → Software InformationDownload the latest firmware only from official LG website.
• 🔒 Network security: if the wrong encryption type is specified in the TV settings (for example, WEP instead of WPA2-PSK), connection will be impossible. The recommended standard is WPA2/AES.
• 📱 LG TV Plus mobile appIf you use it for control, make sure the same version is installed on your phone and TV. The app is updated frequently, and older versions may not support new TV models.

How to reset network settings on LG TV:

1. Go to Settings → Network → Reset network settings.
2. Confirm the action (you may be asked to enter your PIN, by default 0000 or 1234).
3. After restarting your TV, reconnect to Wi-Fi.

⚠️ Attention: On TVs LG 2016–2018: After a network reset, the account link may be lost. LG ThinQRemember your login and password in advance or unlink your TV in the app.

What should I do if my TV doesn't connect to Wi-Fi after resetting it?

If the TV does not see networks after resetting, try:

1. Connect via WPS (button on the router).

2. Enter network settings manually (select Other → Manual Input).

3. Update the firmware via USB (instructions on the LG website).

If the problem persists, the TV's Wi-Fi module may be faulty (diagnostics at a service center are required).

4. Smartphone settings: Android vs. iOS

Algorithms for scanning a local network Android And iOS They differ greatly. Let's look at the nuances for each platform.

For Android smartphones:

• 🤖 OS version: on Android 10+ Due to privacy restrictions, apps require explicit permission to scan the network. Go to Settings → Apps → Permissions → Local Network and enable access for LG TV Plus or Google Home.
• 🔍 Developer mode: if the phone does not see the TV through Miracast, turn on USB debugging And Wireless display in the developer settings.
• 📱 Phone manufacturer: on Xiaomi, Huawei And Oppo You may need to disable Smart Optimization in your battery settings.

For iPhone (iOS):

• 🍎 AirPlay and HomeKit: LG TV support AirPlay 2 only starting with 2019 models (firmware 04.70.15 and newer). Check compatibility on LG website.
• 🔄 iOS update: on older versions iOS 14.5 There may be problems with detecting devices on the local network. Update your phone via Settings → General → Software Update.
• 🌐 Wi-Fi settings: disable the function Private Wi-Fi address (in network settings) - it may interfere with a stable connection.

Universal method for both platforms:

If automatic detection doesn't work, try connecting manually:

1. Find out the IP address of your TV Settings → Network → Network Status.
2. On your phone, open the casting app (e.g. LG TV Plus or LocalCast).
3. Select the "Connect via IP" option and enter the TV address.

5. IP address conflicts and other network problems

One of the most insidious reasons is IP address conflictWhen two devices on the network receive the same IP address, this causes the phone to "not see" the TV, even though both are connected to the same network.

How to diagnose a conflict:

• 🔢 Checking IP on a TV: go to Settings → Network → Network Status and write down the IP address.
• 📱 Checking IP on your phone: on Android - V Settings → Wi-Fi → [your network] → Advanced; on iOS - V Settings → Wi-Fi → (i) next to the network.
• 🖥️ Checking via a router: Go to the admin panel and look at the list of connected devices (DHCP Clients List). If two devices have the same IP, this is the cause of the problem.

How to solve:

1. Disconnect both devices from Wi-Fi.
2. On the router in the section DHCP → Reservation assign permanent IP addresses to your TV and phone (for example, 192.168.1.100 for TV and 192.168.1.101 for the phone).
3. Reboot your router and reconnect the devices.

⚠️ Attention: If your network uses IPv6, and your TV or phone doesn't support it, you may have detection issues. Try disabling IPv6 in the router settings (section LAN → IPv6).

6. Alternative connection methods if Wi-Fi doesn't work

If all attempts to connect via Wi-Fi are unsuccessful, consider alternative methods. They are less convenient, but guaranteed to work.

Ways to bypass the Wi-Fi problem:

• 🔌 HDMI cable with adapter: For Android can be used USB-C → HDMI adapter (for example, Google Chromecast or Amazon Fire TV Stick), and for iPhone — Apple Lightning Digital AV Adapter.
• 📶 Wi-Fi Direct (direct connection):
  1. On TV: Settings → Network → Wi-Fi Direct → Enable.
  2. On your phone: In your Wi-Fi settings, find the network with the name DIRECT-xx-LG_[model] and connect to it.

🖥️ DLNA/UPnP via apps: Install on your phone BubbleUPnP (Android) or nPlayer (iOS) and manually enter the TV's IP address.

🔄 Screen Mirroring via USB: some models LG (For example, OLED CX) support USB Screen ShareConnect your phone with a cable. USB-C/Lightning → USB-A to the TV port and select the source USB.

Pros and cons of each method:

⚠️ Attention: When using Wi-Fi Direct Turn off mobile internet on your phone—it may interfere with a stable connection.

7. Diagnosing hardware problems

If none of the software methods help, the problem may be hardware-related. Let's look at common hardware problems and how to check for them.

Signs of hardware problems:

• 📡 TV Wi-Fi module:
  • The TV does not find any networks, although the router is working.
  • The Wi-Fi indicator on the TV is flashing red or is not lit.
  • An error appears in the network settings Failed to connect or Authentication error.
• 📱 Wi-Fi/Bluetooth module of the phone:
  • The phone does not see any devices Miracast or AirPlay.
  • Wi-Fi works, but the speed is extremely low (less than 1 Mbps).
• 🔌 Router power supply:
  • The router reboots spontaneously.
  • The overheating indicator is on.

How to check:

1. TV Wi-Fi module test:
   • Connect the TV to the router via cable EthernetIf the internet works, the problem is in the Wi-Fi module.
   • Try connecting to TV from another device (tablet, laptop).

Phone test:

• Try connecting to a different TV or smart speaker.
• Install the application WiFi Analyzer (Android) or Network Analyzer (iOS) and check the signal strength.

⚠️ Attention: If the TV LG If a 2016-2018 model suddenly stopped detecting networks, the capacitors on the Wi-Fi module board may be faulty. In this case, repairs at a service center are required (cost: ₽3,000-5,000).

What should I do if the TV does not turn on after a reset?

If after a reset or firmware update the TV does not respond to the remote control:

1. Unplug the TV for 1 minute, then plug it back in.

2. Press and hold the button Power on the TV case for 10–15 seconds (hard reset).

3. If the indicator is flashing red, contact the service center - there may be a firmware error.

FAQ: Frequently asked questions about connecting LG TV to your phone

My phone sees the TV, but it can't connect—it says "Connection Error." What should I do?

This error is usually related to:

• Mismatch of Wi-Fi password (check it on both devices).
• Blocking ports on the router (open ports 1900, 5353, 3702).
• Outdated TV firmware (update via Settings → General → Software Update).

Try connecting via Wi-Fi Direct or reset the network settings on your TV.

The option to cast to LG TV isn't showing on my iPhone. Why?

On iPhone for broadcast on LG TV necessary:

• Update your TV to firmware with support AirPlay 2 (not earlier than 2019).
• Make sure that your phone and TV are connected to the same Wi-Fi network (not the guest network!).
• Turn on AirPlay on TV: Settings → General → Apple AirPlay and HomeKit → Enable.

If the option still doesn't appear, try restarting both devices.

My LG TV detects my phone but can't play video—it only plays audio or displays a black screen. What's wrong?

This problem is related to:

• Incompatible codec: LG TV do not support some formats (for example, VP9 or AV1). Try playing the video in H.264 or H.265.
• DRM restrictions: services like Netflix or Disney+ may block broadcasting to uncertified devices.
• Low Wi-Fi speed: For 4K at least is required 25 MbpsConnect to the network 5 GHz or use a cable.

Solution: Convert the video to a supported format or use DLNA instead of Miracast.

After updating my firmware, my TV stopped recognizing my phone. How do I roll back?

Rollback firmware to LG TV It's possible, but not officially supported. Instructions:

1. Download the required firmware version from LG website (select TV model).
2. Unzip the file and copy it to the flash drive in the following format: FAT32.
3. Insert the flash drive into the TV, go to Settings → General → Software Update → Update from USB.

⚠️ Risk: An incorrect rollback can brick your TV. If you're unsure, contact your service center.

Is it possible to connect a phone to an LG TV without Wi-Fi?

Yes, there are several ways:

• Wi-Fi Direct: direct connection without a router (works on most models) LG).
• USB cable: For Android — USB-C → HDMI adapter, for iPhone — Lightning → HDMI.
• Bluetooth: only for transmitting sound (for example, from a phone to a TV as a speaker).

To broadcast your screen without lags, it is better to use a cable.