Recently I found my Poweredge 1850 locked up. Black screen. After powering off the server and restarting it, I was informed that there were memory errors. I was able to boot the server successfully, then I used OpenManage tool to check out what was going on. OpenManage showed that 3 of the memory modules were in Critical mode. Oddly, every one that was Critical was on Bank B. I don't know what the odds of that is, but I'm pretty sure the odds of 3 bad out of 6 total modules, all occupying Bank B, is pretty slim.
I then turned off the machine and replaced both DIMM3A and B. I rebooted, and again, I'm warned of memory issues. When I checked OpenManage, once more, all of the Critical status modules were reported to be on Bank B.
Again, what are the odds?
Does anyone know what all of this is telling me regarding the server?