I have also had problems with some Dell machines at a previous employer. They were refurbs that we had purchased from a vendor other than Dell. One machine in particular would shut down almost as soon as it booted up. Ended up that the heatsink had come loose from the CPU.
Also, you might try installing BOINC and see what happens. That is a GOOD CPU stress tester! :-) -----Original Message----- From: Trimmel-Wyss Doris [mailto:[email protected]] Sent: Friday, September 11, 2009 6:25 AM To: NT System Admin Issues Subject: RE: optiplex 755 random reboots I had an Optiplex 755 (dual core CPU) that did shutdown because of overheating. The reason was a faulty sensor on the Motherboard. Since changing the motherboard the PC runs with no more problems. You can find a log in the BIOS with the reasons for the shutdown, if it is hardware related Doris -----Original Message----- From: Miguel Gonzalez [mailto:[email protected]] Sent: Friday, September 11, 2009 12:12 PM To: NT System Admin Issues Subject: optiplex 755 random reboots Hi all, We have an Optiplex that is mysteriously rebooting by itself.. We change a setting of the Intel MT NIC, motherboard and reinstall OS (RedHat 5.x). We suspect that it could be the CPU that is rebooting the machine before it could get burnt or maybe a failing power supply. Do you guys know of any live CD (Windows or linux based) to run a stress test on the CPU? (it's a quad core) Thanks, Miguel ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
