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MP 7,1 Replaced 580X with W5700X Won't power up.

B

b17777

macrumors regular
Original poster
Jul 14, 2008
234
207
Bought a W5700X on Ebay to replace the 580X and it didn't power on. Put the 580X back in and still no joy.
It's completely dead doesn't do anything.
Can a bad graphics card take the whole computer down ?
Is there a fuse or reset anywhere ?
Did it kill the power supply ?
 
The hardware change may have confused the SMC. Unplug the power cord for at least 15 seconds. Plug power cord back in. Wait at least 5 seconds before hitting the power button.
 
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I bought a second hand Mac Pro with a 580X card. And installed two W6800X duos, without any problem.
So I can not see why one W5700X should cause a problem.

You say it does not power on now. Do you see a SOS signal on the power diode, next to the power button? Or does it not emit any light at all, as you say it is completely dead?
 
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Regulus67 said:
I bought a second hand Mac Pro with a 580X card. And installed two W6800X duos, without any problem.
So I can not see why one W5700X should cause a problem.

You say it does not power on now. Do you see a SOS signal on the power diode, next to the power button? Or does it not emit any light at all, as you say it is completely dead?
Click to expand...
Does not power on at all. No light. Completely dead.
I was wondering if a bad card could take out the power supply ?

Thank you for trying to help.
 
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reader50 said:
The hardware change may have confused the SMC. Unplug the power cord for at least 15 seconds. Plug power cord back in. Wait at least 5 seconds before hitting the power button.
Click to expand...
I'm pretty sure in the multiple times I tried to start it I gave it that much time. It's not at my house so I will try again today. When not in use it has the circuit breaker off so it's had no power to it overnight.
Any other things to check ?
As I said in my other post it'c completely dead, no light comes on at all.
Thank you for trying to help.
 
b17777 said:
Any other things to check ?
Click to expand...
If you have another mac, you should try to see if the Mac Pro can enter DFU mode.
If it can not enter DFU mode, then there is no other option than to let an Apple technician check it.

How to revive or restore Mac firmware - Apple Support

Rarely, a Mac with Apple silicon or the Apple T2 Security Chip might stop responding and need its firmware to be revived or restored by another Mac.
support.apple.com support.apple.com
 
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Regulus67 said:
If you have another mac, you should try to see if the Mac Pro can enter DFU mode.
If it can not enter DFU mode, then there is no other option than to let an Apple technician check it.

How to revive or restore Mac firmware - Apple Support

Rarely, a Mac with Apple silicon or the Apple T2 Security Chip might stop responding and need its firmware to be revived or restored by another Mac.
support.apple.com support.apple.com
Click to expand...
From what I read it needs to show some power to enter DFU mode. Or reset the NVRAM, PRAM and SMC. This is like the power supply has a blow fuse or tripped circuit breaker or is dead. I can't really afford to pay someone else hourly, to go on a fishing trip right now, especially what I imagine Apple would charge. I shouldn't even have put the W5700X on my card, but here I am.
I've always had good luck on Ebay with everything I've bought, but never in my wildest dreams did I think, even if the card didn't work, it would take out the whole computer.
I reached out to the seller, who said he's not a Mac guy, and if we can't figure it out he would refund me, but that still leaves me with a dead computer.
I really appreciate your trying to help.
With all the great Mac people here I was hoping to run into the person who's done a lot of hardware work, specifically the power supply on these.
I see power supplies listed between $99 and $150, I guess if there's no fuse or breaker anywhere to replace or reset, If I could get a confirmation it has been tested and works I could roll the dice and try that.

Again thank you for trying to help !
 
reader50 said:
The hardware change may have confused the SMC. Unplug the power cord for at least 15 seconds. Plug power cord back in. Wait at least 5 seconds before hitting the power button.
Click to expand...
I tried that yesterday with no joy.

Thank you for trying to help !
 
b17777 said:
From what I read it needs to show some power to enter DFU mode.
Click to expand...
The DFU mode is very different from normal boot mode.
You have to hold the power on, while inserting the power cable. It powers the T2 chip and internal SSD pair. The CPU etc is not powered. At least from my experience working on an iMac Pro.


This is why I suggested you try this procedure. As it let me get the iMac Pro into DFU mode, even if it would not power on in normal mode
 
Regulus67 said:
The DFU mode is very different from normal boot mode.
You have to hold the power on, while inserting the power cable. It powers the T2 chip and internal SSD pair. The CPU etc is not powered. At least from my experience working on an iMac Pro.


This is why I suggested you try this procedure. As it let me get the iMac Pro into DFU mode, even if it would not power on in normal mode
Click to expand...
The computer lives at a venue an hour from me, I use it for recording and hosting some plugins via Dante, there are no shows for the summer for the next month or so. Was out yesterday and tried what reader 50 suggested with no luck.
I'm going out next Tuesday and will bring it home to work on it. I have to go out of state the end of next week for work so it might take me a couple weeks to dig into this.

That tear down of your iMacPro is something I don't think I would have tried, I did replaced the hard drive of my 2010 iMac years ago.
I am open to try anything absolutely. When you press the power button should the fans at least start spinning ?
At home I do have a 2018 MacBook Pro with Sonoma and also a M1 Studio running Sequoia I could use.

Again I really appreciate your help.
 
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What model of Mac Pro is this? I've been assuming a 4,1 or 5,1 (which do not have a T1 or T2 chip) but it could be a 7,1 (which does have one).
 
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b17777 said:
I am open to try anything absolutely. When you press the power button should the fans at least start spinning ?
Click to expand...
I just tested on my Mac Pro.
In DFU mode, it shows no sign of life. The light diode near the power button, and the one on the power supply itself, stay off. The fans do not spin either.
The only confirmation you will have is that the Apple Configurator will show the DFU text.
 
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reader50 said:
What model of Mac Pro is this? I've been assuming a 4,1 or 5,1 (which do not have a T1 or T2 chip) but it could be a 7,1 (which does have one).
Click to expand...
Yea I just clicked the 7.1 header and did not elaborate further. I guess I should have.
 
Regulus67 said:
I just tested on my Mac Pro.
In DFU mode, it shows no sign of life. The light diode near the power button, and the one on the power supply itself, stay off. The fans do not spin either.
The only confirmation you will have is that the Apple Configurator will show the DFU text.
Click to expand...
Thank you ! When I get it back to the house next week I'll give it a try. Maybe I can get out there over the weekend.
 
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