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Samsung TV suddenly can't display FullHD via HDMI-Laptop

I regularly attach my Samsung TV to my laptop in order to watch Youtube etc. This had always worked fine until recently. I connected my laptop to my TV and instead of the regular Full HD resolution I was surprised to see a 1440*900 resolution. It's not just a lower resolution, it also stretches the image a lot, making it effectively unusable. The image is sharp though, there doesn't seem to be a loss of clarity.

My laptop is a HP-TRE 71025.
My TV model is a Samsung UE40EH5300.
I connect through a HDMI cable.

Of course I've tried the law of elimination.
The HDMI cable works fine when I use it in conjunction with my PS4. Full HD image so my TV can still display the correct resolution. I've also connected with a different, older TV (HDReady) which gave a perfect, non-stretched image.
My laptop's setting tells me it outputs a Full HD signal when connected to the Samsung TV.
So basically, the HDMI cable, TV and Laptop work but when I combine them I don't get the desired result. It also happened suddenly. I haven't been fidgeting with settings on either of them. Of course after encountering this problem I've tried stuff like resetting the TV settings but to no avail.
Does anybody recognise this or have a clue on what to do?

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Best Answer chosen by Samsungfan312

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Two ideas.

In reply to: Samsung TV suddenly can't display FullHD via HDMI-Laptop

1. You didn't extend the Windows Desktop. It's currently mirroring the laptop display. This should result in what you noted.

2. You might be on W10 and it updated the video driver. Get back to HP and install their latest. If they don't have that, use the HP forums to ask where this driver is. Be sure to keep a copy of this since W10 might do this again.

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The 2nd solution solved it

In reply to: Two ideas.

Thank you for your help. I reinstalled HP-specific drivers for my video card and now it works again just like before. Very annoying how W10 automatically updatet to the wrong drivers but I'm glad that thanks to you I know now how to handle this. Thanks again!

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