If you get the error while trying to connect to Parallels Plesk Panel:
Service is not available now, probably your Plesk is misconfigured. Contact Your provider for details. Internal Plesk error occurred: Unable to connect to database: saved admin password is incorrect.
then the steps to follow are given below. It is assumed you have logged into SSH with root credentials.
1.Reset Plesk admin password in the mysql database
First stop the plesk service:
Note that this will also stop apache and mysql services.
Next set the new password:
export PSA_PASSWORD=’NEW_PASSWORD’ ; /usr/local/psa/admin/sbin/ch_admin_passwd; unset PSA_PASSWORD
4.Start Plesk Service
The above instructions are valid for GNU Linux. It is more or less the same for all distros of Linux except sometimes the paths will change.