Mac Pro 4,1 wont boot

[k-philipsen]

Hi all

As the title describes my mac Pro wont boot after changing the processors.

It is a 4,1 EFI flashed to 5,1
14 gb ram in 7 modules.
Standard grafics card.
Booting from a 128 gb ssd in slot 1.
Standard cpus is two quad core 2,26 GHz
New cpus is two hex core 3,33 GHz x5680.

After changing to the lidless x5680, it wont boot.

I have tried to reseat both cpu several times, only Change is that sometime the fans spin at max rpm, others Very slow/not at all (Dont know)

I have tried to remove everything, ram, optical drive and the entire cpu tray.

When it is on and i Press the diagnostic button the 5V STBY led is orange?
Both cpu leds are OFF.

The original cpus are tighten all the way Down until the screws cant go any further. I do the same thing to the x5680.

When i Mount the original cpus it starts as normal, with no problems.

What am i missing?

Hope you guys can help me, so i can get i working.

 

[h9826790]

Sounds like the X5680 are delidded, aren't they?

 

[k-philipsen]

Sounds like the X5680 are delidded, aren't they?

Yes they are. No lids.

 

[h9826790]

Then do it one by one.

1) Install CPU A only (the rear one)
2) Try to boot

If success, the Mac should boot with full fan speed. Then go to step 4

If failed

3) swap another X5680 into CPU A socket any try again.

If success, the Mac should boot with full fan speed. Then go to step 4

If failed

Result 2) Something is wrong. It's hard to believe you have both failed X5680 at the same time. But as long as your socket is fine for the original CPU. I can only assume there is something wrong during the delidded process, and both CPU were damaged. (END)

4) Install CPU B

If success

Result 1) job done! (END)

If failed

Result 3) one of the X5680 cause no boot, which means high chance has one CPU damaged. (END)

 

[donnyrock]

Then do it one by one.

1) Install CPU A only (the rear one)
2) Try to boot

If success, the Mac should boot with full fan speed. Then go to step 4

If failed

3) swap another X5680 into CPU A socket any try again.

If success, the Mac should boot with full fan speed. Then go to step 4

If failed

Result 2) Something is wrong. It's hard to believe you have both failed X5680 at the same time. But as long as your socket is fine for the original CPU. I can only assume there is something wrong during the delidded process, and both CPU were damaged. (END)

4) Install CPU B

If success

Result 1) job done! (END)

If failed

Result 3) one of the X5680 cause no boot, which means high chance has one CPU damaged. (END)

Anyone knows what this means. The last line is right before it stop and keeps rebooting itself.

 

[h9826790]

PRAM reset and SMC reset nil help?

 

[donnyrock]

PRAM reset and SMC reset nil help?

Did all that. Wonder if it could be video card because of those blue lines?

 

[h9826790]

Did all that. Wonder if it could be video card because of those blue lines?

Those blue lines looks strange to me as well, but a bit hard to believe you get a GPU fail right at the same time.

Anyway, did you verify both CPUs are good (by only installing one CPU in socket A)?

 

[donnyrock]

Those blue lines looks strange to me as well, but a bit hard to believe you get a GPU fail right at the same time.

Anyway, did you verify both CPUs are good (by only installing one CPU in socket A)?

No, not yet. Didn't think of that.