No, unfortunately, I don't have a backup file. Below is an error message that I can see in the log.
2011-10-10 15:00:50.03 spid27s FileMgr::StartLogFiles: Operating system error 2(The system cannot find the file specified.) occurred while creating or opening file 'D:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\log\dbFile_log.LDF'. Diagnose and correct the operating system error, and retry the operation.
2011-10-10 15:00:50.03 spid27s File activation failure. The physical file name "D:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\log\dbFile_log.LDF" may be incorrect.