I have attached a picture of two servers, exactly the same, except for the name, 

One is collecting data as requested and the other is not. I have identified at least two machines that this has been happening. 

If i manually run the request for data it will pull back that individual data but still no collecting of other data. 

I have rediscovered the machine, unmanaged and managed again and still not getting the data requested.

I suspect that the schedule for the jobs is stuck for these two machines but i have no idea how to check it.

Can you please assist