LG TV Error Code 405: How to Fix It
Easy 15-45 minutes Medium Severity
Verified June 2026
- Error Code
- 405
- Brand
- LG TV
- Product Type
- smart_tv
- Severity
- Medium
- DIY Difficulty
- Easy
- Estimated Fix Time
- 15-45 minutes
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Tools You'll Need
- LG TV remote control
- Smartphone or computer (to check server status and download firmware)
- USB flash drive (optional, for manual firmware update)
- Ethernet cable (optional, for wired connection test)
How to Fix Error Code 405
-
Check LG Server Status
-
Restart Your LG TV
Do not simply use the remote to put the TV in standby mode — perform a full power cycle by unplugging the cord from the wall. -
Test and Restart Your Internet Connection
-
Check the Date and Time Settings
-
Clear the LG Content Store Cache
Clearing app data may require you to sign back into the LG Content Store with your LG account credentials. Have your email and password ready. -
Update Your LG TV Firmware
Do not unplug or turn off your TV during a firmware update. Interrupting the update can permanently damage the TV's software. -
Change DNS Server Settings
-
Perform a Factory Reset as a Last Resort
A factory reset will erase all personalized settings, saved accounts, installed apps, and any customized preferences. Make a note of any important settings before proceeding.
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When to Call a Professional
If you have completed all the steps above — including a factory reset — and your LG TV still shows error 405, the issue may be related to a hardware fault with the TV's internal network module or a persistent firmware corruption that cannot be resolved through standard resets. At this point, contact LG Customer Support at 1-800-243-0000 or visit an LG-authorized service center. If your TV is still within its warranty period, LG may repair or replace it at no cost. You should also consider professional help if your TV fails to connect to any network at all, as this could indicate a faulty Wi-Fi card or mainboard that requires a certified technician to diagnose and repair.Frequently Asked Questions
What does LG TV error code 405 mean?
LG TV error code 405 is an app store error that occurs when your TV fails to properly communicate with the LG Content Store. It can be caused by network connectivity problems, corrupted cache data, outdated firmware, incorrect date/time settings, or a temporary outage on LG's servers.
Why does my LG TV keep getting error 405 when downloading apps?
Repeated error 405 when downloading apps usually points to a persistent network issue, an outdated TV firmware version, or corrupted app store data. Try clearing the Content Store cache, updating your firmware, and switching to a wired Ethernet connection instead of Wi-Fi to improve stability.
Will a factory reset fix LG TV error 405?
A factory reset is often effective at fixing error 405 when other methods have failed, as it clears all corrupted settings and restores the TV software to its original state. However, it should be used as a last resort since it erases all your apps, settings, and account data.
Is LG TV error 405 caused by an internet outage?
It can be. Error 405 sometimes occurs when LG's own Content Store servers are temporarily down. Check sites like Downdetector.com or LG's official support page to see if there is a known outage. If LG's servers are the problem, simply wait and try again later.
How do I update my LG TV firmware to fix error 405?
Go to Settings > Support > Software Update > Check for Updates on your LG TV. If an update is available, install it and allow the TV to restart. If your TV cannot connect to check for updates, you can manually download the latest firmware from LG's official website, transfer it to a USB drive, and install it via Settings > Support > Software Update > Update via USB.