Are you trying to figure out why a Sitecore Scheduled tasks in not getting executed? There are good amount of reasons for that and you should be looking at these links to get it working for you.
Oh! You already went through these links still the tasks are not running? Keep reading as I too was haunted with the issue.
Reason why scheduled tasks were not executing
We configured a separate server for Aggregation and Processing and that server was down due to licensing issues. Drilling further into the details I figured out that the agents which are responsible for executing the scheduled tasks are now a part of Sitecore.Processing.config file.
core /sitecore/system/tasks/schedules true master /sitecore/system/tasks/schedules true
Hence the scheduled tasks get executed on Processing server and not the Content Management server.
When did Sitecore change this?
Sitecore.Processing.config was introduced in Sitecore Experience Platform 8.0 rev. 150121 (8.0 Update-1)