On 3/20/2017 12:15 PM, Rosenthal, Shoshana wrote: > You are right it is a Dell PowerEdge. However as I said it stops in the > middle of booting with no message. there may be some status LEDs on the mainboard inside the server that show power on self test results. But, its a 4-5 year old Dell, most likely its power supply has failed. or the main board. For sure its a hardware problem, as if it was a CentOS specific software problem, you'd see the BIOS self test, setup messages, then grub boot, etcetc. standard PC server hardware trouble shooting applies... if its on service contract, call your support provider. if not, and your time is worth less than a replacement server, open it up, unplug everything extra, reseat all the remaining connectors, see if it passes power-on-self-test. if not, swap PSU with an identical server, try again. If it DOES pass POST w/ everything unplugged, plug back in a minimum amount of stuff, repeat.... etc etc etc. -- john r pierce, recycling bits in santa cruz