How to troubleshoot why a Splunk search head is stuck on "Waiting for data" trying to run a search?

Hi I have an issue with a Splunk search head unable to return any search results. It is stuck on "waiting for data" page. I have deleted the dispatch folder and restarted Splunk, but to no relief. Also, l checked on the distributed search and this search head is able to establish connections with all its peers. Please let me know any troubleshooting guidelines that'll assist me. Thanks Mohammed