MP 1,1-5,1 cMP ovtmp, won't start, cpu fan issue. Help!

[ag89]

Hi,

I am running into a very similar problem that anther user here recently detailed at the end of last year (sorry i bumped it so you guys will probably see the similar thread below). I was stupidly adjusting something in my case by my new video card and worried I may have shorted something out. Yesterday I installed the sapphire rx580 into my mid-2010 custom mac pro and updated to os high sierra. Everything was working fine. At the moment when i went to adjust something earlier today the computer shut off. I thought I was grounded and it was a mere touch.

When I turned the machine back on, the display didn't show and eventually (30 seconds in) the CPU fans kicked into overdrive at full power. When I shut it off I get a red light at ovtmp cpu a. When I press the adjacent white button it shows yellow for 5v stby which I believe shows the PSU is still okay (see attached)?

Thinking maybe I coincidentally cracked some of the paste, I re-seated both cpus and even cleaned + swapped them, adding new thermal paste and making sure it made good contact. I've done a lot of troubleshooting by removing various hardware as well. I noticed a little cable with a wire near the heatsink is not fully fastened to the logic board. But it seemed to be working properly even before. I haven't removed the fans over the cpus in years.

I'm hoping at worst I fried the backplane and nothing is wrong with the dual core logic board. Really kind of at a loss. Been searching all over and finding similar issues although fewer instances have users noting the cpu fan issue with the same ovtmp. Or people seem to be able to control their computer despite fans going crazy.

Considering the graphics card was working fine with the os high sierra upgrade yesterday, I can only deduce that the immediate shutdown after making contact inside cause the issue. Feel stupid. But really hope to fix this machine as it's a beast and I am not working remotely for the forseeable future. Any help would be greatly appreciated...attached two images. Thanks to you gurus for the help!

-ag

 

[ag89]

This is after the problem occurred, but when my buddy was helping yesterday he mentioned this was loose and when he tried to disconnect the cord it separated from the logic board. Is it the thermal sensor for the heatsink? Can it be adhered back to the logic board?

Obviously not good, but I had not even removed the CPU tray for ages until the issue with the red light happened.

 

[Macschrauber]

you need to solder the ripped off Northbridge temperature sensor back in place

 

[tsialex]

you need to solder the ripped off Northbridge temperature sensor back in place

Without pads and tracks ripped from the PCB?

RIP CPU tray.

 

[Macschrauber]

Very difficult to do but a Dual Board is a lot to pay...

But if I remember correctly a 5.1 do post even with the Northbridge Sensor disconnected. Fans go panic mode. Tried that once to find the problem of my broken CPU boards.

Guess that happened during investigation, adding another problem.

 

[tsialex]

Very difficult to do but a Dual Board is a lot to pay...

But if I remember correctly a 5.1 do post even with the Northbridge Sensor disconnected. Fans go panic mode. Tried that once to find the problem of my broken CPU boards.

Guess that happened during investigation, adding another problem.

A very skilled technician could epoxy the pads again and bodge the tracks with Kinnar insulated wire/jumpers, but this has a high cost too - PCB repair kits are very costly.

If I was gifted one tray damaged like that I would try to repair it to use as a test tray, but I'd never do it as a contract service.

 

[Macschrauber]

Yes, I'd do it also only for my own needs, never sell a tray butchered that way

I'm thinking of a very thin enamelled copper wire. Looks like one pad goes to ground so it's just the one trace to solder. It's sure a pita but doable.

But anyway, as it might happened after the failure of this Mac Pro it is not the cure of it all.

As written (tested it with a single CPU Tray) the Mac should at least post with Northbridge temperature sensor off.
[automerge]1585001727[/automerge]
no, goes to UD900 Pin 4 and 5 - so it's doable ;-)

and there are 2 test points on the traces with even a little more space to solder. At least on a Single CPU Board.

 

[Macschrauber]

pin 4 goes to pin 1 of the NB Sensor connector

 

[ag89]

Well I'm definitely not skilled enough to adhere it back to the board or do any soldering. I wonder if my local computer repair would take on the task.

Ideally I could find someone to help solder the part and do another test, but I feel like before that I need to find another cpu tray to install to make sure this is not one of two problems. Thanks guys.

 

[Macschrauber]

Maybe find someone who does Smartphone repairs. This is very small, almost not to see with the bare eye (at least for an aged guy like me)

 

[ag89]

Yes, I'd do it also only for my own needs, never sell a tray butchered that way

I'm thinking of a very thin enamelled copper wire. Looks like one pad goes to ground so it's just the one trace to solder. It's sure a pita but doable.

But anyway, as it might happened after the failure of this Mac Pro it is not the cure of it all.

As written (tested it with a single CPU Tray) the Mac should at least post with Northbridge temperature sensor off.
[automerge]1585001727[/automerge]
no, goes to UD900 Pin 4 and 5 - so it's doable ;-)

and there are 2 test points on the traces with even a little more space to solder. At least on a Single CPU Board.

Would this be feasible for someone who has minimal soldering experience or still possible? Also forgive my naivety but what wires or kit would I need in order to fix this part? Right now it's still connected by one tiny wire and the plastic piece has come loose.

 

[Macschrauber]

No that's not a job for someone with basic skills.

 

[ag89]

No that's not a job for someone with basic skills.

Makes sense. And I did forget to mention how the wire is attached, but not to the board. I see it has a little track along the logic board it should be adhered to as well. Bummer if delving into the original issue caused another potentially more costly one.

 

[Macschrauber]

Get another CPU Board to test, Maybe your CPU board gone south, so it doesnt matter if you ripped of the NB Sensor Connector...

For test sake a 4.1 CPU Board would also fit, fans go full throttle but for a quick test that's good enough.

 

[ag89]

Get another CPU Board to test, Maybe your CPU board gone south, so it doesnt matter if you ripped of the NB Sensor Connector...

For test sake a 4.1 CPU Board would also fit, fans go full throttle but for a quick test that's good enough.

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Thank you again. Assuming I won't have access to one from a friend or colleague, here is the cheapest option I found as a test if I were to purchase one. Looks okay?

 

[Macschrauber]

that's really affordable. But that's just a test tool, all fans would go to full speed.
[automerge]1585006510[/automerge]
maybe you'll find a 5.1 Single CPU Board, what you can really use.

 

[ag89]

that's really affordable. But that's just a test tool, all fans would go to full speed.
[automerge]1585006510[/automerge]
maybe you'll find a 5.1 Single CPU Board, what you can really use.

Mac Pro 5,1 A1289 2010-2012 3.2GHZ Quad Core CPU - Processor Tray Board 4GB RAM | eBay

This was pulled from a 2012 Mac Pro. I upgraded the processors and no longer need this processor. Works fine. 4GB RAM HP MT36JSZF51272PZ-1G4F1DD.

www.ebay.com

also found this one

 

[Macschrauber]

Much better, you can put your 5690 in and use your Mac Pro again - if the CPU Board is the culprit.

If not the next thing could be the backplane board.

 

[ag89]

Much better, you can put your 5690 in and use your Mac Pro again - if the CPU Board is the culprit.

If not the next thing could be the backplane board.

Yes! My other option would be to get the dual cpu tray from this seller I chatted that allows a return for a slight restocking fee. The return shipping and fee would be less than the single cpu tray which I would want to upgrade again anywayt.

So if it works, great. If it doesn't I can get the backplane at least return it and not have a single cpu which I'd want to upgrade again anyway. Might be my next course of action if the computer repair doesn't want to meddle with the heat sensor.

 

[tsialex]

Yes! My other option would be to get the dual cpu tray from this seller I chatted that allows a return for a slight restocking fee. The return shipping and fee would be less than the single cpu tray which I would want to upgrade again anywayt.

So if it works, great. If it doesn't I can get the backplane at least return it and not have a single cpu which I'd want to upgrade again anyway. Might be my next course of action if the computer repair doesn't want to meddle with the heat sensor.

No common computer repair business will repair this type of PCB damage.

The time needed to do the repair it is too much, the cost of the supplies is high and no one in the right mind will give any warranty for the service. Just to repair the pads of the connector you have to wait the epoxy 24h to cure, and for do it correctly, you probably will have to do one by one over the course of several days. The lifted PCB tracks could also short circuited and damaged the SMC, if you did powered on the Mac Pro after the damage.

Don't have any hope, buy a mid-2010/mid-2012 single CPU tray and diagnose correctly your Mac Pro. Remember that you could have to buy a new backplane or a new PSU.

 

[ag89]

No common computer repair business will repair this type of PCB damage. The time needed to do the repair it is too much, the cost of the supplies is high and no one in the right mind will give any warranty of the service. The lifted track could have short circuited and damaged the SMC, if you powered on after the damage.

Don't have any hope, buy a mid-2010/mid-2012 single CPU tray and diagnose correctly your Mac Pro. Remember that you could have to buy a new backplane or a new PSU.

Thanks! I'm going to order the single tray to start so I can see if that helps.

edit: Got one for $58. 5,1 single cpu tray!

 

[ag89]

No common computer repair business will repair this type of PCB damage.

The time needed to do the repair it is too much, the cost of the supplies is high and no one in the right mind will give any warranty for the service. Just to repair the pads of the connector you have to wait the epoxy 24h to cure, and for do it correctly, you probably will have to do one by one over the course of several days. The lifted PCB tracks could also short circuited and damaged the SMC, if you did powered on the Mac Pro after the damage.

Don't have any hope, buy a mid-2010/mid-2012 single CPU tray and diagnose correctly your Mac Pro. Remember that you could have to buy a new backplane or a new PSU.

Much better, you can put your 5690 in and use your Mac Pro again - if the CPU Board is the culprit.

If not the next thing could be the backplane board.

Well I just installed the single cpu tray and fired up my my mac pro. Same issue. After about 30-45 seconds, the fans kick into full speed and I get the cpu a ovtmp red light. Is the next step installing a new backplane board?

 

[tsialex]

Well I just installed the single cpu tray and fired up my my mac pro. Same issue. After about 30-45 seconds, the fans kick into full speed and I get the cpu a ovtmp red light. Is the next step installing a new backplane board?

When weird problems like yours happens with me, I always try to test what is working before buying anything else. I know that it's a problem for people that don't have another Mac Pro or a friend that can test parts for you, but if it's something that you have access do it before buying anything else. Your PSU dying can be the cause of your problem too.

Anyway, if you don't have a way to test the PSU now, the next logical step on your diagnose is a replacement backplane, mid-2010 or mid-2012.

 

[ag89]

When weird problems like yours happens with me, I always try to test what is working before buying anything else. I know that it's a problem for people that don't have another Mac Pro or a friend that can test parts for you, but if it's something that you have access do it before buying anything else. Your PSU dying can be the cause of your problem too.

Anyway, if you don't have a way to test the PSU now, the next logical step on your diagnose is a replacement backplane, mid-2010 or mid-2012.

Appreciate the response. One of my initial thoughts actually was the PSU being fried but I kind of overlooked it. I unfortunately don't have access to another mac pro which complicates a bit. With that being said, I suppose I could go either route. Buying another PSU or just installing a new backplane. Seems the cost isn't too different overall.

 

[tsialex]

Appreciate the response. One of my initial thoughts actually was the PSU being fried but I kind of overlooked it. I unfortunately don't have access to another mac pro which complicates a bit. With that being said, I suppose I could go either route. Buying another PSU or just installing a new backplane. Seems the cost isn't too different overall.

Maybe you can find a seller that has both and can accept returns. If not, backplane is the first logical choice, then the PSU.