I have a Dell Poweredge 2800 server running Server 2003. About 2 weeks ago the server was crashing because of faulty memory modules which all were replaced. After the memory was replaced, the server worked fine as it had before for about 2-3 days and then started randomly locking up with no error messages at all approximately once a day (no specific time), sometimes every other day. I can't find anything in the event logs and suspect the problem is hardware related. No updates have been installed since the memory was installed and no new hardware or software was added either. Indicator light on the front of the server flashes amber indicating something is wrong but I'm not sure what. I plan to run the Dell Open Manage system diagnostics this evening once all users are off the server but just wondering if anyone has other suggestions I can try or if there is something else I can check. I've never had random lock ups like this without any error message or entry in the event logs to explain the problem so this is sort of new territory for me.