Buying used LG OLED, advices?

[Zer0]

Hi guys, will be buying used OLED, what would be the best way to check it for any problems?

Static images in different colors or some YouTube clips as test, can you please suggest what is the best way to test it, possibly with recommended links? Thank you very much for your time.

 

[Zer0]

Thanks for your kind reply.

So for gray screens I will use this video for 5% grey:
https://www.youtube.com/watch?v=Qi4Wy7vE8-o&t=1s

or videos from USB from this thread at the beginning which goes from 0% black to 100% white:
https://www.avsforum.com/threads/oled-screen-uniformity-discussion-banding-and-vignetting.2896737/

Any reliable source for RGB and CMYK color screens?
Is this enough?
https://www.youtube.com/watch?v=vImExjfO66E

Or should I try to find screens and download them in RGB and CMYK?

Thanks,
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