Fix “DHCP Lookup Failed” on Chromebook (Wi-Fi Error)

Encountering a “DHCP Lookup Failed” error on a Chromebook can be a frustrating roadblock, especially when you’re trying to connect to Wi-Fi for school, work, or daily browsing. This error typically points to an issue with how the device obtains an IP address from the router, a fundamental part of establishing a successful network connection. Thankfully, this problem is usually easy to resolve.

TL;DR (Too Long; Didn’t Read)

The “DHCP Lookup Failed” error on a Chromebook means the device cannot obtain an IP address from your network. It’s commonly caused by router misconfigurations, DNS issues, outdated firmware, or problems with the Chromebook’s own network settings. Simple fixes include restarting your router, forgetting and reconnecting to the network, updating your Chromebook, or manually setting IP details. In rare cases, a powerwash (factory reset) may be necessary.

What Causes DHCP Lookup Failed on Chromebook?

Understanding the root of the DHCP error can make troubleshooting significantly easier. The Dynamic Host Configuration Protocol (DHCP) is responsible for assigning IP addresses to devices on your network. If this process fails, the Chromebook cannot get internet access. Common reasons include:

• Router issues: Misconfigured settings or outdated firmware.
• Chromebook Wi-Fi settings: Corrupted IP lease or saved profile conflicts.
• IP conflicts: Another device may already have your assigned IP address.
• Interference or range: Weak Wi-Fi signal can interrupt DHCP processes.

Steps to Fix DHCP Lookup Failed on Chromebook

1. Restart Your Router and Chromebook

The simplest and most often effective solution is a restart. Power cycles can clear temporary network misconfigurations.

• Unplug your router for 30 seconds and plug it back in.
• Reboot your Chromebook by holding the power button and turning it off, then back on.

This clears temporary DHCP cache on both sides.

2. Forget and Reconnect to Wi-Fi

Forgetting the network erases saved preferences and allows a fresh DHCP handshake.

1. Click the time icon in the bottom-right of the Chromebook.
2. Select your connected Wi-Fi network, then click the settings gear icon.
3. Click the three dots next to the network and choose Forget.
4. Reconnect by entering the Wi-Fi password again.

3. Check for Router Firmware Updates

Outdated routers can cause connectivity issues, including faulty DHCP allocation. Use a browser and log into your router’s web interface—usually at 192.168.1.1 or 192.168.0.1.

• Log in with your admin credentials.
• Look for a section labeled Firmware Update or System.
• Follow the on-screen instructions to update the firmware.

After updating, restart the router and try reconnecting your Chromebook.

4. Change DNS Settings

Domain Name System (DNS) problems can affect DHCP operations. Switching to a public DNS like Google’s can fix lookup failures.

1. Go to ChromeOS Settings > Network.
2. Select your current Wi-Fi network and scroll to Network section.
3. Click Network Settings > Name Servers.
4. Choose Custom and enter: 8.8.8.8 and 8.8.4.4.

Try reconnecting after applying these changes.

5. Assign a Static IP Address

If the Chromebook struggles to automatically receive an IP address, assigning a static one may help. However, make sure it won’t conflict with other devices.

1. In ChromeOS Settings, click on your network and select Network.
2. Change IP settings to Static.
3. Manually enter:
   • IP address: 192.168.1.120 (use an unused IP in your range)
   • Gateway: 192.168.1.1
   • Subnet Mask: 255.255.255.0
   • DNS: 8.8.8.8

Tap Connect and verify if the connection is restored.

6. Try a Different Wi-Fi Network

To determine if the issue is isolated to one network, try connecting to a different Wi-Fi source, like a mobile hotspot. If it works, the problem lies with your original Wi-Fi network or router. If not, the issue is likely within the Chromebook’s network configuration.

7. Powerwash Your Chromebook (Factory Reset)

This should only be done as a last resort, as it erases all local data and settings. A powerwash resets your device to its original state and can fix deep software problems impacting DHCP.

1. Go to Settings > Advanced > Reset settings.
2. Click Powerwash and follow the prompts.

After rebooting, go through the setup process and connect to Wi-Fi.

Prevention Tips

To avoid future DHCP touchpoints, consider implementing the following:

• Regularly reboot your router to keep it operating efficiently.
• Keep both your Chromebook and router firmware up to date.
• Avoid assigning static IPs unless necessary—let DHCP handle it dynamically.
• Limit heavy interference from other electronics by repositioning the router closer to devices.

When to Call Tech Support

If none of the earlier steps work, it might be time to contact:

• Your Internet Service Provider (ISP), who may need to reset your connection.
• Your Chromebook’s manufacturer for potential hardware diagnostics.

Especially if other devices work fine on the same network, it could be a Chromebook-specific hardware fault.

Conclusion

The “DHCP Lookup Failed” error might sound technical, but it’s generally easy to troubleshoot for most users. By methodically checking your router, adjusting network settings, and rebooting hardware, you can eliminate the issue in minutes. Persisting problems may require a deeper reset, but thankfully, most users won’t need to go that far.

Frequently Asked Questions (FAQ)

Why does my Chromebook say DHCP Lookup Failed?

This usually means the router failed to assign an IP address via DHCP protocol. It could be a router, software, or device configuration issue.

Is DHCP Lookup Failed a hardware issue?

Not typically. Most of the time, the problem lies with software settings or network configuration. Rarely, it could be due to faulty Wi-Fi hardware.

Will powerwashing delete all my files?

Yes. A Powerwash resets your Chromebook to factory state and deletes all local accounts, data, and settings. Backup any important files to Google Drive first.

Can I fix this without accessing the router settings?

Yes, steps like forgetting the network, changing DNS, or using a hotspot can work without router access. That said, full troubleshooting is easier with access to router settings.

Does this problem affect other devices?

If the DHCP server on the router is misbehaving, yes, multiple devices could show similar issues. However, if it’s only your Chromebook, the problem is likely device-specific.