The best mechanism is to see “Event Log”. From here, you may get the whole story about windows 2003 server.
Or, you may download a small free tool called WinDbg, / Windows Debugger.
Notes: There is a way “Memory Dump” that is a snapshot of what the system had in memory when it crashed. There are 3 types of that, viz, Small / mini dump; Kernel dump and Complete or Full dump.
Please look here for More Utility Tools for your purpose.