What's happening when you can't connect to a network

When your device won't connect to a network, one of three things is usually broken: your device can't find the network, it found the network but can't authenticate (prove it's allowed to join), or it connected but can't actually send data through. The fix depends on which one is happening, and you can narrow it down by watching what your device tells you as you try to connect.

Most connection problems live in one of four places: your device's network hardware, your router, your internet service provider's equipment, or the network settings themselves. You don't need to understand networking to fix this — you just need to know which piece to restart and in what order.

Key Takeaways

  • Restart your device first, then your router, waiting 30 seconds after unplugging the router before plugging it back in.
  • Check whether your device can see the network name at all — if not, the problem is usually your router, not your device.
  • If your device sees the network but won't connect, try "forgetting" the network and reconnecting with the password again.
  • If you're connected but have no internet, restart your modem (the device your internet service provider gave you) separately from your router.

The restart sequence that fixes most connection problems

Before you change any settings, restart things in this order: your device, then your router, then your modem if you have one. Most connection problems vanish after a restart because temporary glitches in the device's memory clear out.

Restart your device normally — shut it down completely and turn it back on. While it's restarting, unplug your router (the device that broadcasts your Wi-Fi signal) for 30 seconds, then plug it back in. If your modem is a separate device (a box your internet service provider installed), unplug that too and wait 30 seconds before plugging it back in. The modem should restart first, then the router — give each one two minutes to fully start up before trying to connect again.

This works because routers and modems hold temporary data in memory that sometimes gets corrupted. Unplugging them clears that memory completely. A software restart of your device alone usually doesn't clear the same memory in your network hardware.

Checking whether your device can see the network

Open your device's network settings and look at the list of available networks. If you can see your network name (also called the SSID), your router is broadcasting correctly and the problem is either authentication or a broken connection after you join. If you don't see your network name at all, the problem is almost certainly your router.

On Windows, go to Settings > Network & Internet > Wi-Fi and look for "Show available networks". On Mac, click the Wi-Fi icon in the menu bar at the top right. On iPhone or iPad, go to Settings > Wi-Fi. On Android, go to Settings > Network & Internet > Wi-Fi.

If your network name doesn't appear in the list, try moving closer to the router — sometimes a weak signal makes the network invisible even though it's broadcasting. If it still doesn't appear after moving closer, restart the router again and wait a full two minutes before checking the list again.

Fixing authentication problems when the network appears but won't connect

If you can see your network name but your device won't connect, or connects and immediately disconnects, the problem is usually that your device and router disagree about the password or security settings. The fastest fix is to "forget" the network on your device and reconnect from scratch.

On Windows, go to Settings > Network & Internet > Wi-Fi > Manage known networks, find your network, and click "Forget". On Mac, go to System Settings > Wi-Fi, click "Details" next to your network, then click "Forget". On iPhone or iPad, go to Settings > Wi-Fi, tap the information icon next to your network, and tap "Forget This Network". On Android, long-press your network name and tap "Forget".

After forgetting the network, go back to the available networks list, select your network again, and enter the password. Make sure you're typing the password exactly as it appears — passwords are case-sensitive, so "MyPassword" is different from "mypassword". If you don't remember the password, you can usually find it on a sticker on the back or bottom of your router, or in your router's settings page (you'll need to look up how to access that for your specific router model).

When you're connected but have no internet

If your device shows it's connected to the network but you can't load websites or use internet apps, the problem is between your router and your internet service provider. This usually means your modem needs to restart.

Your modem is the device that connects to your internet service provider's network — it's often a separate box, but sometimes it's built into your router. If you have a separate modem, unplug it for 30 seconds and plug it back in. If your router and modem are combined into one device, you've already restarted it in the earlier steps, so try unplugging it again and waiting a full minute before plugging it back in.

While the modem restarts, check whether you can see a light on it that indicates internet connection — usually labeled "Internet", "WAN", or "Online". If that light is red or off after the modem finishes restarting, the problem is with your internet service provider's network, not your device or router. Contact your service provider to report an outage.

Checking for driver or software problems on your device

If restarting and forgetting the network don't work, your device's network hardware might have a driver problem — the software that lets your operating system talk to your network card. On Windows, go to Device Manager (search for it in the Start menu), find "Network adapters", right-click your network adapter, and select "Update driver". On Mac, network drivers usually update automatically through System Updates, so go to System Settings > General > Software Update and install any available updates.

On iPhone, iPad, and Android, drivers update automatically with the operating system. If you're on an older version of iOS or Android, go to Settings > General > Software Update (iPhone/iPad) or Settings > About Phone > System Update (Android) and install any available updates.

If updating the driver doesn't work, try uninstalling and reinstalling it. On Windows, right-click the network adapter in Device Manager and select "Uninstall device", then restart your computer — Windows will automatically reinstall the driver on startup.

Checking your router's settings if nothing else works

If your device can see the network and you've entered the correct password, but still can't connect, your router's settings might be blocking your device. Most routers have a settings page you can access by typing the router's IP address into a web browser — usually 192.168.1.1 or 192.168.0.1, but check your router's manual or the sticker on the back to be sure.

Look for a section called "Device Management", "Connected Devices", "MAC Filtering", or "Access Control". If MAC filtering is turned on, your device's hardware address might be blocked. You can usually find your device's MAC address in its network settings — on Windows, open Command Prompt and type "ipconfig /all", on Mac, go to System Settings > Wi-Fi > Details and look for "MAC Address", on iPhone go to Settings > General > About and look for "Wi-Fi Address", and on Android go to Settings > About Phone > Status and look for "Wi-Fi MAC address". Add your device's MAC address to the allowed list in your router's settings.

Frequently Asked Questions

Why does my device connect to the network but then disconnect after a few seconds?

This usually means your device and router are disagreeing about security settings or the password changed. Forget the network on your device and reconnect with the password. If it keeps disconnecting, restart your router and try again. If the problem continues, check whether your router's firmware needs an update — look in your router's settings page for a "Firmware Update" or "Software Update" section.

My device says "can't connect to this network" but other devices can connect fine. What's wrong?

The problem is specific to your device, not your router. Try forgetting the network and reconnecting. If that doesn't work, restart your device completely. If you're on Windows or Mac, check for driver updates. If the problem persists, your device's network hardware might be failing — try connecting with an ethernet cable if your device supports it, or use a USB network adapter to test whether the problem is your built-in network card.

How do I know if the problem is my internet service provider and not my router?

If your device is connected to the network but can't reach the internet, check the light on your modem. If it's red or off, your service provider's network is down. You can also try connecting another device to the same network — if it also can't reach the internet, the problem is your modem or service provider, not your router. Call your service provider to report an outage.

Can I fix a connection problem by restarting just my device?

Sometimes, but not usually. Restarting your device clears its memory but not your router's. If restarting your device alone doesn't work, unplug your router for 30 seconds and plug it back in. This clears the router's memory and fixes most connection problems that a device restart alone won't solve.

What if I've tried everything and still can't connect?

If restarting, forgetting the network, updating drivers, and checking router settings don't work, your device's network hardware might be failing. Try connecting with an ethernet cable if your device has an ethernet port, or use a USB network adapter. If those work, your built-in network card is the problem. If nothing works, contact your device's manufacturer for support.