Thank you for the pictures. I did some follow up on this issue; the CS24-SC was a custom solution for a customer with no support.   There are no service tags,  no parts or support options for this piece of equipment through Dell.  You may be able to find parts from ebay or other used equipment sources.  
I have a Dell 1U Model CS24-SC. It has 2 Intel Quad Core Xeon L5420's in it. There is no service tag sticker on it. Also, the service tag does not show up in the BIOS. Instead, the BIOS shows the first seven digits from the serial number of the unit. This looks very similar in ways to the current PowerEdge C1100. Though, this definitely has a different motherboard and is older. My server was manufactured in 2008. I noticed that the PSU fans never spin. Is this normal for the C1100 model? I was thinking that maybe they are temperature controlled fans and the temperature has not exceeded the threshold for them to cut on. I've had it running in a very cool environment for testing. My server looks exactly like the one shown at [URL] . Any idea where I could download BIOS / firmware updates for this server? I tried calling Dell support on this. Since I didn't have a service tag, I got transferred around a few times. I've been on hold for almost an hour and a half since the last transfer. I don't think I'm getting anywhere using the phone route.
PSU fans not spinning on 2008 model CS24-SC