iMac Pro / Motherboard dead / No leds on

Question

iMac Pro

The iMac Pro, is Apple’s most powerful iMac to date. It comes with either a 3.2 GHz 8 core, 3.0 GHz 10 core, 2.5 GHz 14 core or 2.3 GHz 18 core Xeon W processor. EMC 3144 / A1862 (ID iMacPro1,1)

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Olivier Paulart @olivierpaulart

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crwdns2931729:0crwdne2931729:0: Dzi 14, 2024

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iMac Pro / Motherboard dead / No leds on

Hi everyone, I have an issue with my imac pro. It doesn't start anymore.

I have no leds light on motherboard. I already changed power supply but same thing. Thank you for your help.

Regards

Mise à jour...

Je me suis rendu compte qu'il y avait un bouton sous les leds sur lequel il faut appuyer pour avoir l'état.

Seul la première led s'allume. J'ai également essayé de me connecter en DFU et j'y arrive par contre j'ai une erreur quand j'essaie de restaurer.

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I have the same issue. Power supply is good, power does come in to the power supply but the LEDS are out.

crwdns2934271:0Mud 15, 2024crwdnd2934271:0 Paul crwdne2934271:0

Under and to the right of the leds is a push button. The leds will not enable unless this button is pressed.

crwdns2934271:0Mha 4, 2024crwdnd2934271:0 mon2 crwdne2934271:0

Spanish:

Yo estoy en la misma situación, si alguien puede facilitarme el esquema de conexionado y de tensiones se lo agradecería.

English:

I'm in the same situation, if someone can provide me with the connection and tension scheme I would appreciate it

crwdns2934271:0Kul 29, 2025crwdnd2934271:0 Antonio Fernandez Reina crwdne2934271:0

We have limited information on the iMac Pro system. Here’s a deeper view internally iMac Pro Teardown.

Sadly I never was able to locate schematics and board view drawings for this system. With the logic board number (820-00967) you might google it to see if your luck is any better than I had. I was only able to find this 820-0067 Component Identify thread which offers a link to the schematic but it’s damaged.

I would start off making sure the power cord and power supply are good. As most of the failures are due to power surges or lightning strikes. There are a few onboard diagnostic LED’s you do need to press the small orange button just below the five LED’s.

crwdns2934271:0Kul 29, 2025crwdnd2934271:0 Dan crwdne2934271:0

@danj

https://www.badcaps.net/forum/troublesho...

crwdns2934271:0Kul 29, 2025crwdnd2934271:0 mon2 crwdne2934271:0

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I have the same issue. Power supply is good, power does come in to the power supply but the LEDS are out. — Paul
Under and to the right of the leds is a push button. The leds will not enable unless this button is pressed. — mon2
Spanish:

Yo estoy en la misma situación, si alguien puede facilitarme el esquema de conexionado y de tensiones se lo agradecería.

English:

I'm in the same situation, if someone can provide me with the connection and tension scheme I would appreciate it — Antonio Fernandez Reina
We have limited information on the iMac Pro system. Here’s a deeper view internally iMac Pro Teardown.

Sadly I never was able to locate schematics and board view drawings for this system. With the logic board number (820-00967) you might google it to see if your luck is any better than I had. I was only able to find this 820-0067 Component Identify thread which offers a link to the schematic but it’s damaged.

I would start off making sure the power cord and power supply are good. As most of the failures are due to power surges or lightning strikes. There are a few onboard diagnostic LED’s you do need to press the small orange button just below the five LED’s. — Dan

score 0 · Answer 1 · 2024-04-14T08:09:28-07:00

Dan @danj

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Self employed contract worker

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crwdns2931729:0crwdne2931729:0: Dzi 14, 2024

crwdns2933897:0crwdne2933897:0

I would check the AC socket as well as manually short the power button line to see if the button has failed as well as check the power rails.

It’s also likely you have a short within the logic board logic. You need the schematics and board views to work this out.

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@danj exactamente estoy buscando donde repararlo no me importa pagar por la información.

Exactly, I'm looking for where to repair it I don't mind paying for the information.

crwdns2934271:0Kul 30, 2025crwdnd2934271:0 Antonio Fernandez Reina crwdne2934271:0

@antoniofer31583 - Ideally, you want to find a local shop, you may no choice other than Apple.

Lo ideal es que busques una tienda local, y puede que no tengas otra opción que Apple.

crwdns2934271:0Kul 30, 2025crwdnd2934271:0 Dan crwdne2934271:0

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iMac Pro

iMac Pro / Motherboard dead / No leds on

Update (04/19/24)

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