iMac Pro / Motherboard dead / No leds on

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iMac Pro

iMac Pro，Apple 迄今为止性能最强的 iMac 。可选配置包括3.2 GHz 8核，3.0 GHz 10核，2.5 GHz 14核，2.3 GHz 18核 Xeon W 处理器。EMC 3144 / A1862 (ID iMacPro1,1)

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Olivier Paulart @olivierpaulart

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发帖于: 2024年4月14日

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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

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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.

由 Paul 完成的 2024年5月15日

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

由 mon2 完成的 2024年8月4日

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

由 Antonio Fernandez Reina 完成的 2025年3月29日

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

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.

由 DanJ 完成的 2025年3月29日

@danj

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

由 mon2 完成的 2025年3月29日

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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拆解.

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. — DanJ

DanJ @danj 声誉积分: 494.9千 Self employed contract worker 35 338 974 · Answer 1 · 2024-04-14T08:09:28-07:00

DanJ @danj

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发帖于: 2024年4月14日

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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.

由 Antonio Fernandez Reina 完成的 2025年3月30日

@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.

由 DanJ 完成的 2025年3月30日

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iMac Pro

iMac Pro / Motherboard dead / No leds on

Update (04/19/24)

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