The combo updater wouldn't hurt.
But, because a reinstall of the system is so easy, I would likely do that next.
Sierra is (pretty) good, in my opinion. But, there are still multiple reported issues, with USB, graphics in some ways, maybe other hardware issues, that Apple is still working on. Next update might take care of your issue, don't know.
But, prepping for the next update release (and assuming that you have had Sierra installed for more than a week or two), I would boot to the Sierra installer, and reinstall now. (Just what I would do, but then I do a fair amount of hardware "blunders", and tend to reinstall about once a month, after I "guess" wrong 😀 )