Here are some powershell commands to quickly help you turn on verbose logging and aggrigate all of the logs from all of the servers (for a specific time span) into one file for review.
Powershell command to turn on full verbose logging.
Set-SPLogLevel -TraceSeverity VerboseEx
Reproduce the issue you are having...
Powershell command to turn off verbose logging.
Powershell command to aggrigate the logs from all servers in the farm.
Merge-SPLogfile -path c:\mergedULS.log -starttime <"mm/dd/yyyy hh:mm"> -endtime <"mm/dd/yyyy hh:mm">
After performing the steps above you will have a single log file that you can analyze in a log viewer tool (such as ULSViewer) to help you more efficiently identify your issue.