Try another console like ALT-F2. See if you have a black screen login prompt. I opened a bug with RedHat for a system that when I went from 6.7 to 6.8 booted but would not start the X server. Problem was in the MACH64 driver. It is missing an external symbol that the X server requires. -----Original Message----- From: CentOS [mailto:centos-bounces at centos.org] On Behalf Of Leroy Tennison Sent: Monday, March 20, 2017 1:35 PM To: centos <centos at centos.org> Subject: Re: [CentOS] Need help This is a wild guess since the problem I had occurred on Ubuntu 16.04 LTS but the symptoms are identical. Try 'systemctl enable console-getty.service' then 'systemctl start console-getty.service' or, if it is headless (serial console only), 'systemctl enable serial-getty at ttyS0.service' then 'systemctl start serial-getty at ttyS0.service' assuming it's ttyS0). For VMs (specifically kvm/qemu) neither of these "solutions" worked. ----- Original Message ----- From: "Rosenthal, Shoshana" <srosenthal at cfa.harvard.edu> To: "centos" <centos at centos.org> Sent: Monday, March 20, 2017 3:25:06 PM Subject: Re: [CentOS] Need help I figured out that the system boots OK and it is possible to login remotely. However the monitor does not start up. Do you know how to fix it? On Mon, Mar 20, 2017 at 3:15 PM, Rosenthal, Shoshana < srosenthal at cfa.harvard.edu> wrote: > You are right it is a Dell PowerEdge. However as I said it stops in the > middle of booting with no message. > > > > On Mon, Mar 20, 2017 at 3:11 PM, John R Pierce <pierce at hogranch.com> > wrote: > >> On 3/20/2017 11:54 AM, Scott Robbins wrote: >> >>> I am running centos 6.8 >>>> The system went down when we try to reboot it we get the >>>> message ST:3P7Y9Y1 >>>> Do you know what the problem might be. >>>> >>> I'm guessing you mean the message on the front panel, which is the >>> service >>> tag number. >>> >> >> indeed, thats the service tag for a Dell PowerEdge T620, shipped in >> September 2013, with dual Xeon E5-X2667, 48GB ram, and 10 3TB drives, >> originally running RHEL 6.5 >> >> indeed, you need to connect a monitor to it to determine what stage of >> the boot is failing and why. >> >> >> -- >> john r pierce, recycling bits in santa cruz >> >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos >> > > _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos _______________________________________________ CentOS mailing list CentOS at centos.org https://lists.centos.org/mailman/listinfo/centos