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How to solve the Invalid Sources on LG TV?

Invalid sources appeared on LG TV

Invalid Sources Appeared on LG TV

We set up the video conference unit environment where this has a docking station connecting to the laptop via USB3, the camera connecting to the docking station via USB3 cable, and the LG TV connecting to the docking station via HDMI cable. When I’m trying to connect the LG TV with the laptop using the multiple screen view on Windows 10, the message appeared “Invalid Sources” on the TV.

The Solution for Invalid Source

We thought maybe because the TV resolution might not match with the laptop resolution. We changed the display resolution on the Windows to lower such as 1280 x 960 and keep the changes and then switch back to default. This change worked well. Once this is done, the display configuration somehow now this setup and no more Invalid Source appeared on the TV!!!

To do this:

Under Windows 10, click the Start button.

Select the Settings (gear icon).

Select the Display option.

By default, under Multiple displays, the option is Duplicate these displays option.

Under the Display resolution, select the lower resolution such as 1280 x 960.

Invalid sources appeared on LG TV. Display resolution.

Click the Keep changes button.

Back to under the Display resolution, select the recommended resolution.

Click the Keep changes button.

Our Environment

Microsoft Surface laptop
Toshiba KIRA laptop
Microsoft Surface Pro laptop
HP Elitebook laptop
Dell docking station

The End

If you have reached the end of this article, congratulation. Hopefully, we have been able to shed some light on how to handle the invalid sources on the TV.

We write this in such a way that this is not a fix article. Like in this journey, we learn as we go and we re-write some parts of the article so please keep pinging with this article.

We also would love to hear about how you deal with the situation and what problems you might be facing. Please feel free to leave us a comment below this article and let us know if you have any questions that we can answer! Thanks again!

Big thank you for the photo by Max Vakhtbovych from Pexels.

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About Author

Valdy founded, a helpdesk and IT Services provider that has taken care of nearly 40,000 customer service requests in the past 15 years - nearly 2,600 per year. He also created the growing - a classified website that has close to 110,000 page views and 9,000+ user visits per month with 61,000+ yearly published ads and 47,000 active registered users. He blogs for the ever-growing, a tech blog that gets around 20,000 impressions per month with 700 clicks and 10 average pages first impressions on Google Search. You can reach him on the Contact Us page, social media links below or

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