If the cables are okay, then more than likely this issue is the lever system itself. A lot of times these get locked up and just don't move any more. The worst is when they get locked with the brake applied.
I attached a number of documents that illustrate this. What I would do is just remove the cable from the lever and try to operate it and see if it still does not drop. If not, then you need to replace it. If it does then there is a cable issue.
Please run through this material and let us know if you have questions.
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Thursday, June 17th, 2021 AT 3:50 PM