OBIEE 11g services started but coreapplication is down / red.

Our OBIEE 11.1.1.6.5 instance was runing fine, I had to restart the BI services, after which I noticed obiee application was not working properly. I checked in em, all services were up and running:

However the coreapplication parent status in the tree structure was still showing as red:

This appears to be a common problem, and solution seems to be stopped deployments in weblogic console.

Open weblogic console and navigate to deployment:

Search deployments with the status of 'Prepared' (sort by the status) and select them. Next, click on start:

This will prompt you if you want to start the selected deployments, choose yes:

This will change the status from prepared to 'Active'

Once this has been done for all stopped deployments, go back to EM and refresh the screen, All services should appear to be started now: