Why isn't my router transmitting Wi-Fi? A complete diagnostic and solution.

You turned on your router, but devices can't see the network or connect? Wi-Fi Is the light on, but there's no internet? This problem affects 78% of users, and in 90% of cases, it can be resolved without calling a technician. The key is to correctly identify the cause: it could be a hardware failure, a settings error, or external interference.

Today we will look at all possible scenarios: from a banal button shutdown WPS to complex cases involving antenna damage. This article is suitable for routers of any brand— TP-Link, ASUS, Keenetic, Zyxel, MikroTik and others. It doesn't matter whether you use 2.4 GHz or 5 GHz — the diagnostic algorithm is universal.

⚠️ Attention: If the router provides Internet via cable (via LAN), but it doesn't distribute data over the air—the problem is definitely with the Wi-Fi module. If the cable isn't working either, first check your connection to your ISP.

1. Checking basic settings: buttons, power, cables

Let's start with the obvious: the router may be physically disconnected from the network or blocked. Note:

• 🔌 Nutrition: Is the indicator on? PowerIf the light is blinking or not lit, check the power supply and outlet. Try a different adapter (for example, one from a smartphone with a similar connector).
• 📡 Wi-Fi button: on some models (ASUS RT-AX56U, TP-Link Archer C6) There is a separate button to turn on the wireless network. It can be pressed accidentally.
• 🔗 Provider cable: if used PPPoE or DHCP, check if the cable is firmly inserted into the port WAN (usually highlighted in blue).
• 🔄 Reboot: Unplug your router for 30 seconds to clear the cache and temporary errors.

If the indicator Wi-Fi If the light doesn't light at all, there's a hardware problem (a burned-out module or antenna). If it lights up, but the devices don't see the network, proceed to the next section.

⚠️ Attention: On routers with dual firmware (Keenetic, some Zyxel) After a power failure, backup firmware may be activated. In this case, the network will have a different name (for example, Keenetic-1234-RESERVE).

2. Factory reset: when and how to do it

If the router was working before, but after changing the settings it stopped distributing Wi-Fi, this will help hard resetThis will reset all settings to factory defaults, including the network name (SSID) and password.

How to reset:

1. Press and hold the button Reset (usually recessed into the body, requires a paper clip or toothpick).
2. Hold for 10-15 seconds until the indicators start flashing randomly.
3. Release the button and wait for the reboot (1-2 minutes).

After reset:

• 🔑 The network name will return to the default (for example, TP-LINK_1234).
• 🔒 The password will be indicated on the router sticker (or blank if the model is older).
• ⚙️ All additional settings (VPN, GoIP, Parent Control) will fly off.

⚠️ Attention: On routers with MikroTik RouterOS Resetting the license will erase it if it was linked to the device. It can only be restored through WinBox with a backup copy.

3. Firmware issues: updating and downgrading

Firmware glitches are one of the most insidious causes. They can manifest themselves in various ways:

• 📶 The network is visible, but the connection keeps dropping.
• 🔄 The router reboots spontaneously.
• ⚡ Indicator Wi-Fi blinks in an unusual way (for example, red).

How to check the firmware version:

1. Connect to the router via cable (LAN).
2. Go to the control panel (the address is indicated on the sticker, usually 192.168.1.1 or 192.168.0.1).
3. Go to the section System → Information (the name may differ).

If the firmware version is older than 2023, it needs to be updated. Exception: routers MikroTik with version 6.48.6 and below - they have a critical vulnerability in the Wi-Fi module, which was fixed only in 7.1+.

Update instructions:

• 📥 Download the firmware from official website manufacturer (do not use third-party sources!).
• 🖥️ Go to Administration → Software Update.
• 🔄 Download the file and wait for it to complete (do not turn off the router!).

⚠️ Attention: On routers ASUS with firmware Merlin Before updating, you must disconnect all USB devices and AiMesh, otherwise the process will end with an error.

What to do if the firmware crashes?

If the router does not boot (only the power indicator is on), try restoring the firmware via TFTP-mode. To do this:

1. Connect the router to the PC via cable.

2. Set the computer's IP address manually: 192.168.1.2 (mask 255.255.255.0).

3. Launch TFTP-client (for example, Tftpd64) and download the firmware with the extension .bin.

4. Wait until it is finished (the indicators should flash synchronously).

4. Channel conflicts and interference: how to choose the optimal channel

If your router is distributing Wi-Fi, but the speed is extremely slow or the connection constantly drops, interference is to blame. In apartment buildings, channels 2.4 GHz often overloaded, and 5 GHz may not pass through walls.

How to check channel load:

1. Install the application on your smartphone Wi-Fi Analyzer (Android) or NetSpot (iOS/macOS).
2. Check which channels neighboring networks are using. The best option is to choose the least congested one.

Recommendations for choosing a channel:

How to change the channel in the router settings:

1. Go to Wireless Network → Wi-Fi Settings.
2. Select manual mode (Manual) and specify the channel.
3. Save the settings and reboot the router.

5. Authentication errors: password, encryption type, MAC filtering

If devices "see" the network but don't connect, the problem lies in the security settings. The most common culprits are:

• 🔐 Incorrect password: Check the case of letters and symbols. iPhone The password can be copied with a space at the end.
• 🔒 Unsupported encryption type: if the router is configured to WPA3, and the device is old (for example, Samsung Galaxy S7), it will not be able to connect.
• 🖥️ MAC filtering: If enabled, the router blocks all devices except those manually allowed.

How to fix:

1. Go to Wireless Network → Security.
2. Install WPA2-PSK (the most compatible option).
3. Turn it off MAC filtering, if it is active.
4. Try temporarily disabling the password (leaving the network open) for a test.

⚠️ Attention: On routers Zyxel Keenetic When changing the password, the settings sometimes get lost 802.11r (fast roaming). If devices don't connect after changing the password, disable this option in Additional Wi-Fi settings.

6. Hardware faults: antennas, overheating, capacitors

If you've tried all software methods but Wi-Fi still isn't working, the problem is hardware. Common problems:

• 📡 Antenna damage: Check that they are not bent and that they are screwed tightly. On some models (TP-Link Archer C20) antennas fall off the board when dropped.
• 🔥 Overheat: If the router is hot, turn it off for 10 minutes. Dust inside the case can block cooling.
• 🔋 Swollen capacitors: If your router is more than 5 years old, disassemble it and inspect the circuit board. Swollen capacitors will look like "bubbles."

How to check antennas:

1. Disconnect the router from power.
2. Carefully unscrew the antennas and inspect the connectors. RP-SMA (they must be clean, without oxidation).
3. Reconnect the antenna and check if the signal has improved.

If your router is beeping or smells like smoke, don't turn it onThese are signs of a short circuit. In such cases, repairs will cost more than a new device.

7. Problems from the provider: blocking and restrictions

Sometimes Wi-Fi isn't available due to internet service provider restrictions. This applies to:

• 📶 Mobile Internet (4G/5G routers): Your operator may block Wi-Fi distribution if you do not have an unlimited plan.
• 🏢 Corporate networks: in offices they often turn off DHCP, and devices do not receive an IP address automatically.
• 🔒 Parental control: The provider may restrict access to Wi-Fi at certain times (for example, Rostelecom or Beeline).

How to check:

1. Connect your computer to the router via cable (LAN).
2. If the internet works, the problem is in the Wi-Fi router settings.
3. If it doesn't work, call your provider and check if there are any blocks.

⚠️ Attention: On routers with LTE modem (Huawei B535, ZTE MF286) When the traffic is exhausted, Wi-Fi may turn off, even if the router screen says "Connected".

How to bypass data sharing blocking by mobile operators?

Some operators (eg. Megaphone or Tele2) block Wi-Fi hotspots on plans without this option. You can bypass the restriction:

1. Connect the router to the phone via USB-ethernet adapter (if supported).

2. Using VPN on the router (for example, OpenVPN).

3. Having changed TTL in the settings (requires root rights on the phone).

Attention: Such actions may violate the operator's user agreement.

8. Additional features that break Wi-Fi

Many users enable "advanced" settings without understanding how they work. This can lead to problems:

• 🔄 Roaming Assistant: If enabled, the router forces the device to switch between 2.4 GHz And 5 GHz, which causes breaks.
• 🛡️ Protection against attacks (DoS, ARP): may block legitimate devices if they send too many requests.
• 📊 QoS (Traffic Prioritization): Incorrect rules can choke Wi-Fi, giving priority to cable connections.
• 🌐 Guest network: If the main network is disabled and the guest network is not configured, the router may not distribute Wi-Fi at all.

How to disable unnecessary features:

1. Go to Additional settings → Wireless network.
2. Turn it off Roaming Assistant, AirTime Fairness And Band Steering.
3. In the section Security turn it off Self-service interface (SPI).

⚠️ Attention: On routers MikroTik function Wireless Snooper can completely block Wi-Fi if there is a device with a non-standard one on the network MAC address.

FAQ: Frequently Asked Questions about Wi-Fi Problems

🔍 Why does my router distribute Wi-Fi but not the internet?

This means the router is working but can't connect to the ISP. Check:

• Is the cable connected to the port? WAN (not in LAN!).
• Are the connection details entered correctly? (PPPoE, L2TP).
• Is there any blocking by the provider (payment, technical work).

If you use 3G/4G router, check your SIM card balance and signal level.

📱 My phone connects to Wi-Fi, but websites won't open. What's wrong?

There is probably a problem with DNS. Try:

1. In your router settings, change DNS to 8.8.8.8 (Google) or 1.1.1.1 (Cloudflare).
2. On your phone, manually enter DNS in the Wi-Fi settings.
3. Turn it off IPv6 in the router settings (sometimes it conflicts with DNS).

🔌 After a thunderstorm, my router stopped broadcasting Wi-Fi. What should I do?

Most likely it burned down network controller or power unit. Check:

• Does the router smell like burning?
• Is the indicator light on? Power.
• Are the ports working? LAN (connect the computer with a cable).

If all else fails, the router will need to be replaced. Repairs will cost 60–80% of the cost of a new device.

🖥️ My laptop can't see the 5 GHz network, but my phone can. Why?

Your laptop probably doesn't support it. 5 GHz. Check:

1. Wi-Fi adapter model (in Device Manager).
2. Router settings: some older adapters do not work with higher channels 149.
3. Drivers: Update them through the official website of the laptop manufacturer.

If the adapter only supports 2.4 GHz (For example, Intel Wireless 3160), connect to this network.

🔄 My Wi-Fi keeps disconnecting and reconnecting. How do I fix it?

The reasons may be different:

• Interference: change the channel to 1, 6 or 11.
• Router overheating: Provide ventilation, do not place it in a closed cabinet.
• Weak signal: If your device is on the edge of coverage, try repeater or Mesh system.
• Energy saving: on phones Xiaomi or Samsung Disable the "Turn off Wi-Fi in sleep mode" option.