I think the first thing you should do is check the database's
status.
You can find useful info from alert<sid>.log, from this file,
You will know whether the database has started up successfully.
Another issue about ORA-28000:
Cause: The user has entered wrong password consequently for maximum number of times specified by the user's profile parameter FAILED_LOGIN_ATTEMPTS, or the database administrator has locked the account.
Action: Wait for PASSWORD_LOCK_TIME or contact the database administrator.
In addition , you need find other log info from emoms.log,
which record much behavior of EM itself.
QUOTE:
最初由 tesge 发布
登陆进em后，老显示：
数据库状态当前不可用。可能是因为数据库的状态为装载或不装载。单击 '启动' 可以获得当前状态并打开数据库。如果无法打开数据库, 单击 '执行恢复' 可执行相应的恢复操作。
点击“启动按狃”后抱同样的错误。
另外：当我登陆进去em时，显示：
SQLException
ORA-28000: 帐户已被锁定
