Solved! Samsung Laptop (Notebook 9 Pro) CMOS battery location

sorry, Samsung model numbers are so misleading.

your laptop most likely doesn´t have a separate CMOS battery, the main battery will reset the CMOS if removed or empty.
To reset the CMOS manually, remove the main battery and press the power button for at least 30seconds.
Thank you so much for posting this! I tried fixing my computer 3 years ago and gave up. I decided to try again and found this post. It works now!!!