Error When SQL 2000 Start

When starting my SQL Server 2000 generate error and stop. This is the log:
Standard Edition on Windows NT 4.0 (Build 1381: Service Pack 6)

2004-01-20 11:05:36.59 server Copyright (C) 1988-2000 Microsoft Corporation.
2004-01-20 11:05:36.59 server All rights reserved.
2004-01-20 11:05:36.59 server Server Process ID is 115.
2004-01-20 11:05:36.59 server Logging SQL Server messages in file 'C:MSSQL7logERRORLOG'.
2004-01-20 11:05:36.63 server SQL Server is starting at priority class 'normal'(1 CPU detected).
2004-01-20 11:05:36.66 server SQL Server configured for thread mode processing.
2004-01-20 11:05:36.66 server Using dynamic lock allocation. [2500] Lock Blocks, [5000] Lock Owner Blocks.
2004-01-20 11:05:36.67 server Attempting to initialize Distributed Transaction Coordinator.
2004-01-20 11:05:38.69 spid3 Starting up database 'master'.
2004-01-20 11:05:38.85 spid3 Server name is 'DB_SERVER'.
2004-01-20 11:05:38.85 server Using 'SSNETLIB.DLL' version '8.0.194'.
2004-01-20 11:05:38.87 server SQL server listening on TCP, Shared Memory, Named Pipes.
2004-01-20 11:05:38.87 server SQL server listening on 192.168.1.29:1433, 172.16.48.10:1433, 127.0.0.1:1433.
2004-01-20 11:05:38.87 server SQL Server is ready for client connections
2004-01-20 11:05:38.87 spid5 Starting up database 'model'.
2004-01-20 11:05:38.87 spid8 Starting up database 'msdb'.
2004-01-20 11:05:38.87 spid9 Starting up database 'pubs'.
2004-01-20 11:05:38.87 spid10 Starting up database 'Northwind'.
2004-01-20 11:05:38.87 spid11 Starting up database 'SIM'.
2004-01-20 11:05:39.21 spid5 Error: 9003, Severity: 20, State: 1
2004-01-20 11:05:39.21 spid5 The LSN (5:377:1) passed to log scan in database 'model' is invalid..
2004-01-20 11:05:39.31 spid8 Bypassing recovery for database 'msdb' because it is marked SUSPECT.
2004-01-20 11:05:39.39 spid11 Starting up database 'GMS'.
2004-01-20 11:05:39.39 spid8 Starting up database 'euro'.
2004-01-20 11:05:40.14 spid10 Starting up database 'TigrisDB'.