LG TV Error 105 — What It Means & How to Fix It

What Does This Error Mean?

Error 105 on an LG Smart TV means the TV can reach your router but cannot contact a DNS server to look up website addresses. DNS is the system that translates names like lg.com into the actual server addresses the TV needs to connect. Switching to Google DNS (8.8.8.8) or restarting your router resolves Error 105 in most cases.

Affected Models

LG OLED C3
LG QNED85
LG UHD 75UP8770
LG NanoCell 90
LG OLED evo G3

Common Causes

Your ISP's DNS servers are temporarily down or slow to respond
Router is providing an incorrect or unreachable DNS server address to devices
A router firmware update has changed the DNS settings unexpectedly
Your ISP has changed their DNS server addresses and the router has not updated
The TV is using a manually configured DNS that is no longer valid

How to Fix It

Restart your router by unplugging it for 30 seconds and plugging it back in.

A router restart forces it to request fresh DNS server addresses from your ISP — this fixes Error 105 in many cases.
On the TV, go to Settings → General → Network → Advanced Wi-Fi Settings.

This is where you can manually set the DNS server — you will need this for the next step.
Set the DNS server to 8.8.8.8 (Google DNS) or 1.1.1.1 (Cloudflare DNS).

These public DNS servers are highly reliable and always available — switching to them bypasses your ISP's DNS entirely.
Save the settings, then run a network connection test: Settings → General → Network → Connection Test.

The connection test now shows whether internet access is restored after the DNS change.
If Error 105 still shows, power cycle the TV by unplugging it for 60 seconds and restarting.

This clears any cached DNS failure state and forces the TV to retry with the new DNS server.
Try the network test again — if internet is now working, test a streaming app to confirm full functionality.

A successful streaming test confirms the DNS change has fully resolved Error 105.

When to Call a Professional

Error 105 is a DNS configuration issue — no professional TV repair is needed. All fixes involve changing network settings on the TV or router, which you can do yourself. If changing to Google DNS does not resolve the issue, contact your ISP about their DNS server availability.

Frequently Asked Questions

What is DNS and why does it cause Error 105 on my LG TV?

DNS (Domain Name System) is like a phone book for the internet. When your TV wants to reach lg.com, it asks a DNS server to look up the address — without DNS, it cannot find anything online. Error 105 means the TV found your router but the DNS server is unreachable, so no internet services can be accessed.

Is it safe to use Google DNS (8.8.8.8) on my LG TV?

Yes — Google Public DNS (8.8.8.8) is one of the most widely used and trusted DNS services in the world. It is faster and more reliable than most ISP-provided DNS servers. Using it on your TV does not affect other devices on your network — the setting only applies to the TV.

Error 105 keeps coming back — how do I stop it recurring?

Set the DNS to 8.8.8.8 permanently in Settings → General → Network → Advanced Wi-Fi Settings. Also check if your router's firmware needs updating — old router firmware can assign bad DNS addresses. If the problem is with your ISP's DNS, using a public DNS server permanently is the most reliable solution.