Sometimes I see questions asked by super-low-rep users, even reputation-1, which have one (or more) reasonable answers with some upvotes - but no answer is accepted, and the OP doesn't make any comments or indicate they have reason not to accept; they just disappear, possibly forever.

What should I/we do in these cases, as a non-moderator, non-answer-provider, but relatively high-reputation user?

Note: I mean what should I do now, not what possible solutions could there be to this issue involving changes to the system etc.

Sometimes I see questions asked by super-low-rep users, even reputation-1, which have one (or more) reasonable answers with some upvotes - but no answer is accepted, and the OP doesn't make any comments or indicate they have reason not to accept; they just disappear, possibly forever. This is generally a bit annoying, but my problem is with the case in which it is not immediately clear that the answer is the right one, or that it helped/would help the OP - seeing how s/he has not accepted it; it might make other people doubt its validity when they shouldn't (in my opinion).

So, ok, I upvote it. Now it has, say, 2 instead of 1 upvotes. That still doesn't quite resolve things.

What should I/we do in these cases, as a non-moderator, non-answer-provider, but relatively high-reputation user?

Note: I mean what should I do now, not what possible solutions could there be to this issue involving changes to the system etc.