How to fix no signal from backup camera aftermarket Android car stereo

I found a solution for the "No Signal" problem from the backup camera. It took me a while before I figure this problem out by accident. I have been looking for the solution from youtube but can't find any help, so I just thought this would help people with the same issue.

Android 10 car stereo purchased from Aliexpress installed on 2006 Mazda 5.

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