Help identify the pinout of the PSU (A1419, EMC 2546)?

Question 1

0 crwdns2873741:0crwdne2873741:0

crwdns2934197:0crwdne2934197:0 iMac Intel 27" EMC 2546 crwdns2933315:00crwdne2933315:0

Duck 6,1crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Kul 26, 2026

commented Kul 26, 2026 crwdns2933505:0crwdne2933505:0 Duck

Question 2

5 crwdns2873741:0crwdne2873741:0

LED #1 blinks when connected. iMac not turning on

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933315:05crwdne2933315:0

Rafael

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Sun 7, 2026

commented Sun 7, 2026 crwdns2933505:0crwdne2933505:0 Rafael

Question 3

1 crwdns2930801:0crwdne2930801:0

Why won’t it turn on

iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

DanJ 500crwdns2936485:0crwdne2936485:0

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N'w 21, 2025

answer edited N'w 21, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 4

16 crwdns2873741:0crwdne2873741:0

Apple STUMPED - iMac shuts off randomly, daily to multiple times/hour

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933315:016crwdne2933315:0

John McIntosh

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N'w 2, 2025

commented N'w 2, 2025 crwdns2933505:0crwdne2933505:0 John McIntosh

Question 5

1 crwdns2930801:0crwdne2930801:0

iMac not booting, reboots after login

iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

Paul L

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Kho 28, 2025

commented Kho 28, 2025 crwdns2933505:0crwdne2933505:0 Paul L

Question 6

1 crwdns2930801:0crwdne2930801:0

Replaced HD with SSD and have flickering horizontal lines on start-up

iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

DanJ 500crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Dzi 10, 2025

commented Dzi 10, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 7

1 crwdns2930801:0crwdne2930801:0

Display screen shows only wall paper (Catalina) no menu bar even on ex

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

DanJ 500crwdns2936485:0crwdne2936485:0

crwdns2931737:0crwdne2931737:0

Kul 25, 2025

answer edited Kul 25, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 8

1 crwdns2930801:0crwdne2930801:0

Late 2012 iMac no longer boots. Black screen, no chime, no fans.

iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

DanJ 500crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Kul 3, 2025

commented Kul 3, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 9

0 crwdns2873741:0crwdne2873741:0

How do I take the AC inlet port out?

crwdns2934197:0crwdne2934197:0 iMac Intel 27" EMC 2546 crwdns2933315:00crwdne2933315:0

Din0saur

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Yan 23, 2025

asked Yan 23, 2025 crwdns2933505:0crwdne2933505:0 Din0saur

Question 10

0 crwdns2873741:0crwdne2873741:0

No Display but a little light on boot after replacing ssd.

crwdns2934197:0crwdne2934197:0 iMac Intel 27" EMC 2546 crwdns2933315:00crwdne2933315:0

DanJ 500crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Yan 19, 2025

commented Yan 19, 2025 crwdns2933505:0crwdne2933505:0 DanJ

Question 11

6 crwdns2873741:0crwdne2873741:0

Display Falls Off After Repair - New Adhesive Not Sticking Properly

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933315:06crwdne2933315:0

hwc1534

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Sun 29, 2025

commented Sun 29, 2025 crwdns2933505:0crwdne2933505:0 hwc1534

Question 12

1 crwdns2930801:0crwdne2930801:0

Are all A1419s physically compatible?

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

DanJ 500crwdns2936485:0crwdne2936485:0

crwdns2931737:0crwdne2931737:0

N'w 16, 2024

answer edited N'w 16, 2024 crwdns2933505:0crwdne2933505:0 DanJ

Question 13

2 crwdns2873741:0crwdne2873741:0

Inconsistent 2 or 4 LED; sometimes Chimes; sometimes even works!

iMac Intel 27" EMC 2546 crwdns2933315:02crwdne2933315:0

Chrisynd

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Nhl 22, 2024

commented Nhl 22, 2024 crwdns2933505:0crwdne2933505:0 Chrisynd

Question 14

0 crwdns2873741:0crwdne2873741:0

Reuse the camera and microphone of an A1419 (EMC 2546)

crwdns2934197:0crwdne2934197:0 iMac Intel 27" EMC 2546 crwdns2933315:00crwdne2933315:0

oldturkey03 853,1crwdns2936485:0crwdne2936485:0

crwdns2931735:0crwdne2931735:0

Nhl 21, 2024

crwdns2931431:0crwdne2931431:0 Nhl 21, 2024 crwdns2933505:0crwdne2933505:0 oldturkey03

Question 15

1 crwdns2930801:0crwdne2930801:0

Install OS on 2012 iMac headlessly?

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

Deling Ren 55

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Ndz 22, 2024

commented Ndz 22, 2024 crwdns2933505:0crwdne2933505:0 Deling Ren

Question 16

2 crwdns2873741:0crwdne2873741:0

2012 27" iMac runs slow after replacing screen

iMac Intel 27" EMC 2546 crwdns2933315:02crwdne2933315:0

FAM

crwdns2931741:0crwdne2931741:0

Mha 12, 2024

commented Mha 12, 2024 crwdns2933505:0crwdne2933505:0 FAM

Question 17

2 crwdns2873741:0crwdne2873741:0

Recovering a late 2012 iMac's Fusion Drive using a different PC

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933315:02crwdne2933315:0

Frank

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Mha 9, 2024

answer accepted Mha 9, 2024 crwdns2933505:0crwdne2933505:0 Frank

Question 18

1 crwdns2930801:0crwdne2930801:0

Did I damage the display?

iMac Intel 27" EMC 2546 crwdns2933313:01crwdne2933313:0

DanJ 500crwdns2936485:0crwdne2936485:0

crwdns2931217:0crwdne2931217:0

Mha 2, 2024

answered Mha 2, 2024 crwdns2933505:0crwdne2933505:0 DanJ

Question 19

3 crwdns2873741:0crwdne2873741:0

Making iMac headless. iMac GPU & CPU issues

iMac Intel 27" EMC 2546 crwdns2933315:03crwdne2933315:0

P. D.

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Maw 1, 2024

commented Maw 1, 2024 crwdns2933505:0crwdne2933505:0 P. D.

Question 20

2 crwdns2873741:0crwdne2873741:0

How is xeon support?

crwdns2934195:0crwdne2934195:0 iMac Intel 27" EMC 2546 crwdns2933315:02crwdne2933315:0

Ed Chen

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Kho 8, 2024

answer accepted Kho 8, 2024 crwdns2933505:0crwdne2933505:0 Ed Chen

crwdns2944620:0iMac Intel 27" EMC 2546crwdne2944620:0

iMac Intel 27" EMC 2546 crwdns2934277:0crwdne2934277:0