why is my charging cable when I plug it in go from Green to Orange and not charging my Mac Pro?

Hello There,

I am new to the community and desperately need possible answers to my question.

My charging cable light when I plug it in changes almost immediately from "green to orange" and is not charging my computer.

This happened to me about 8 months ago also. I went to the "Best Buy" and purchased a new one about 8 months ago. This is the charging cable I have been using. I just thought the original charging cable I had damaged by accidentally by vacuuming that part of the cable. You can laugh....Anyway although the cable didn't look damaged I figured it had to be the reason why the original charging cable no longer worked.

Now once again with the new charging cable I am having the same problem except I have not vacuumed it up this time. lol

My MacPro is now down to 25% of power left.

Can anyone please give me any ideas about what may be the problem this time? I would greatly appreciate anyone's or everyones help or ideas.

Thank-you very much. I look forward to hearing what you "pros" think is the problem.

In case my laptop goes down due to lack of charging I do have an iPad to receive answers.

Sincerely,

Lori