"Admin" mode is "help! help! something went wrong I can start but in a more or less useless way".
Admin mode will not allow you to make anything useful for OBIEE.
So open the log of the managed server and find why it start in admin mode
Yup i have changed on the JDBC Data Sources, Connection Pool URL:
this was pointing to wrong DB, corrected & restarted working fine now.
So just one extra stop: close the thread (for now still This question is Not Answered.) and then enjoy your weekend