Adding troubleshooting step for events not arriving

Time range sometimes needs to be provided in order for the query test to operate. 
https://social.msdn.microsoft.com/Forums/officeocs/en-US/9d0f52b2-a749-4f1c-af77-aad712efb4e5/unable-to-get-the-data-with-stream-analytics-query

Author: joe-plumb

articles/stream-analytics/stream-analytics-troubleshoot-input.md

@@ -25,6 +25,8 @@ This page describes common issues with input connections and how to troubleshoot
 
     Inspect the sample data to understand the shape of the data: the schema and the [data types](https://docs.microsoft.com/stream-analytics-query/data-types-azure-stream-analytics).
 
+3.  Ensure you have selected a time range in the input preview. Click the “Select time range” and provide a sample duration before testing your query.
+
 ## Malformed input events causes deserialization errors 
 Deserialization issues are caused when the input stream of your Stream Analytics job contains malformed messages. For example, a malformed message could be caused by a missing parenthesis or a brace in a JSON object, or an incorrect timestamp format in the time field.