Hello, I hope you are well.
I have a CNC machine from the company YetiTool, which I bought a Raspberry and put the operating system that came to me on the original Raspberry, because it broke, I transferred it to a new Raspberry and it doesn’t give an image, the screen stays blank. black, however in the old one it did give an image and worked, in fact if I try it the original works but since it had a problem I can’t use it now.
What could it be that the image remains black?
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Unfortunately that machine is made by a different company (YetiTool) so I think that you will need to post in their forums to get a good answer 
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