A7V600: Has the mainboard killed my CPU?

[Stefan vom Bruch]

I have built a few systems and regularly exchange peripherals but I
have never come across this before...

I replaced my old mainboard by an A7V600. I plugged in the CPU+Cooler,
memory, graphics card and power switch connector. I supplied power to
the board, the green light went on. I switched it on, the CPU fan
started to spin, after two seconds the board switched itself off
again. After that I cannot switch it on again, even though the green
light is still on. (It will do the same thing again however if I
switch the psu off and on again).
I removed everything from the board and it worked fine. When I plug in
the CPU, it does not.
I tried to move the CPU back to my old board. Same effect. It will not
boot anymore.
It looks like the CPU is dead, right?

Now, if I damaged it when I moved it from one board to the other then
that is something I just have to live with. Since I am usually very
carefull however and have never damaged a component before, I am
thinking that there is the possibility the new board may have killed
it and I am just a little bit anxious to simply buy a new CPU and plug
it in.
Is this likely?

 

[Wazza]

I have built a few systems and regularly exchange peripherals but I
have never come across this before...

I replaced my old mainboard by an A7V600. I plugged in the CPU+Cooler,
memory, graphics card and power switch connector. I supplied power to
the board, the green light went on. I switched it on, the CPU fan
started to spin, after two seconds the board switched itself off
again. After that I cannot switch it on again, even though the green
light is still on. (It will do the same thing again however if I
switch the psu off and on again).
I removed everything from the board and it worked fine. When I plug in
the CPU, it does not.
I tried to move the CPU back to my old board. Same effect. It will not
boot anymore.
It looks like the CPU is dead, right?

Now, if I damaged it when I moved it from one board to the other then
that is something I just have to live with. Since I am usually very
carefull however and have never damaged a component before, I am
thinking that there is the possibility the new board may have killed
it and I am just a little bit anxious to simply buy a new CPU and plug
it in.
Is this likely?

There is a better chance you chipped a corner off the die when you were
fitting the CPU cooler to the CPU.
Just a tiny bit chipped of a corner of the die kills the CPU stone cold
dead. Remove the cooler and then the CPU and clean the die so you can get a
good look at all 4 corners of the die and if one of the corners is not
perfectly square, it`s dead.
(e-mail address removed)

(e-mail address removed)

Understanding Computers
2A Eastleigh Loop, Currumbine,
West Australia. 6028

 

[Stefan vom Bruch]

There is a better chance you chipped a corner off the die when you were
fitting the CPU cooler to the CPU.
Just a tiny bit chipped of a corner of the die kills the CPU stone cold
dead. Remove the cooler and then the CPU and clean the die so you can get a
good look at all 4 corners of the die and if one of the corners is not
perfectly square, it`s dead.
(e-mail address removed)

No, there is no visible physical damage to the CPU or the board - as
far as I can see. Thanks anyway.

 

[Canus_Lupus]

Your next step will be to try your CPU in another mobo. There is only your
RAM, CPU and video card that will stop booting if your BIOS is ok.