Sysjas,  From the Svc Tag you sent, the motherboard installed in the server currently is the XDN97. Sorry for the delay, I am not in till 6:30am CST. Hope this helps.
Since I haven't got any further with the  E1000 Failsafe voltage error. Contact support. The next thing to do I guess is replace the motherboard of the Dell R610. Looking on eBay there are a number of different model / serial numbers that are mentioned Eg: F0XJ6, 3YWXK, XDN97, 0NCY41 08GXHX and others. What is the motherboard model / serial number I should actually be using for replacement in this Dell R610 which has this failsafe voltage error? Are there other serial numbers this depends on? (Maybe I am not looking in the right place but even when I enter the service tag in the support web site I can't find the serial number of the motherboard... Let alone if I should be getting the same motherboard again or maybe a "better" one?) Thanks!    Jason
Dell R610 motherboard replacement model number