Desktop Won't Boot

[crazymonkeyzero]

My desktop/workstation (~6months old) has been working fine till last night. This morning, however I found that it had turned itself off. When I try to boot up again it doesn't boot. Fans spin, leds work, but there is no signal to monitor. Furthermore inside my case, the "diag.cpu" led on the mobo is illuminated. Does this mean my cpu is dead? Do cpus just die? (I never Overclock, but system runs 24/7 on 30-80% load, temps are always less than 60C) Here is my system rundown. I tried clearing CMOS (by altering jumper), did not work.

Intel Xeon E3 1275V2
Mobo: Asus P8C WS
Memory: 16gb 4x4gb Kingston DDR3 1600 ECC
PSU: Seasonic X620
HDD: 1TB Seagate
Cooler: Corsair H60


How should I go about diagnosing the problem? My mobo apparently has a 3 year warranty, and the seasonic psu has a 5 year warranty, which is the only thing going for me.


Thanks so much for the help.

 

[mfenn]

CPUs can die, but it's extremely rare. Try running it with just one DIMM (cycle through the DIMMs) and see if the behavior changes.

 

[crazymonkeyzero]

Thanks for your reply mfenn. Got around to trying the ram sticks one at a time and still no boot. Also there is an led for dram diagnosis, which should illuminate if the ram was the culprit. it did not, so I am guess the problem lies elsewhere. The diag cpu led on my board is still illuminate however. Should I purchase a psu tester it see it it is the problem?

And if its not the psu, its more likely the mobo than the cpu right?

 

[mfenn]

Diagnosis lights on boards are not 100% reliable, don't put too much faith in them. That being said, your test does indicate that there isn't a memory problem.

Most power supply testers are also unreliable because they don't present a realistic load profile. A better use of $30 would be to buy an inexpensive PSU (this CX500 is plenty) and use that as a known-good spare.