Monitors: Web Service - Correct Configuration

Can you provide the HTTP Monitor that you are using (after masking out any URL information) ?

You can test functionality of the pool member by using CURL from the F5 bash shell. Something like this:

curl -H "Host: domain.com" http://10.10.10.10/health-check.html

In the above case, you are checking the pool member 10.10.10.10 on port 80 (http) by requesting the resource at ";. The output will provide you information on the HTTP response provided by the pool member.