iMac doesnt start up!….no leds on.

Question 1

2 crwdns2873741:0crwdne2873741:0

iMac Intel 27" Retina 5K Display 2020 crwdns2933315:02crwdne2933315:0

oldturkey03 815,1crwdns2936485:0crwdne2936485:0

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Kul 20, 2025

answered Kul 20, 2025 crwdns2933505:0crwdne2933505:0 oldturkey03

Question 2

2 crwdns2873741:0crwdne2873741:0

Why is there two thin (purple and green) vertical lines? how to fix?

iMac Intel 27" Retina 5K Display 2020 crwdns2933315:02crwdne2933315:0

Dan 490crwdns2936485:0crwdne2936485:0

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Sun 1, 2025

commented Sun 1, 2025 crwdns2933505:0crwdne2933505:0 Dan

Question 3

1 crwdns2930801:0crwdne2930801:0

upgrade to any release except mojave impossible after disc change

crwdns2934195:0crwdne2934195:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

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N'w 5, 2024

commented N'w 5, 2024 crwdns2933505:0crwdne2933505:0 Dan

Question 4

1 crwdns2930801:0crwdne2930801:0

How to bypass password?

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

crwdns2931217:0crwdne2931217:0

Ndz 11, 2024

answered Ndz 11, 2024 crwdns2933505:0crwdne2933505:0 Dan

Question 5

2 crwdns2873741:0crwdne2873741:0

Can I separate the display glass from the display?

iMac Intel 27" Retina 5K Display 2020 crwdns2933315:02crwdne2933315:0

Dan 490crwdns2936485:0crwdne2936485:0

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Mud 8, 2024

answered Mud 8, 2024 crwdns2933505:0crwdne2933505:0 Dan

Question 6

1 crwdns2930801:0crwdne2930801:0

No Administrator Account - iMac Totally Erased

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

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Dzi 17, 2024

commented Dzi 17, 2024 crwdns2933505:0crwdne2933505:0 Dan

Question 7

1 crwdns2930801:0crwdne2930801:0

not booting black screen and no chimes

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

crwdns2931741:0crwdne2931741:0

Dzi 23, 2024

commented Dzi 23, 2024 crwdns2933505:0crwdne2933505:0 Dan

Question 8

1 crwdns2930801:0crwdne2930801:0

Shuts down unexpectedly when screen recording.

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

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Sun 26, 2024

commented Sun 26, 2024 crwdns2933505:0crwdne2933505:0 Dan

Question 9

1 crwdns2930801:0crwdne2930801:0

Second SSD or HDD inside

crwdns2934195:0crwdne2934195:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Ilya Khromov 11

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Huk 27, 2023

answer accepted Huk 27, 2023 crwdns2933505:0crwdne2933505:0 Ilya Khromov

Question 10

2 crwdns2873741:0crwdne2873741:0

iMac 20.1 i5 3.3 GHz to i9 10900K upgrade

crwdns2934195:0crwdne2934195:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933315:02crwdne2933315:0

Simon 73

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Maw 2, 2024

answer edited Maw 2, 2024 crwdns2933505:0crwdne2933505:0 Simon

Question 11

1 crwdns2930801:0crwdne2930801:0

What can this system support for upgrades?

crwdns2934195:0crwdne2934195:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

A S 87

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Nhl 15, 2023

answer accepted Nhl 15, 2023 crwdns2933505:0crwdne2933505:0 A S

Question 12

2 crwdns2873741:0crwdne2873741:0

Displays an Apple for about 20 seconds and then reboots. Any thoughts

iMac Intel 27" Retina 5K Display 2020 crwdns2933315:02crwdne2933315:0

huachomartin

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Yan 22, 2025

commented Yan 22, 2025 crwdns2933505:0crwdne2933505:0 huachomartin

Question 13

1 crwdns2930801:0crwdne2930801:0

Is PA-1311 the right PSU for iMac 27" 2020 model?

crwdns2934195:0crwdne2934195:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

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Ndz 1, 2023

commented Ndz 1, 2023 crwdns2933505:0crwdne2933505:0 Dan

Question 14

1 crwdns2930801:0crwdne2930801:0

Fan turns on but screen wont boot

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

yaboi

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Mha 25, 2023

commented Mha 25, 2023 crwdns2933505:0crwdne2933505:0 yaboi

Question 15

1 crwdns2930801:0crwdne2930801:0

Screen is black after trying to upgrade ram.

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

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Mha 1, 2023

answer edited Mha 1, 2023 crwdns2933505:0crwdne2933505:0 Dan

Question 16

0 crwdns2873741:0crwdne2873741:0

Shuts down unexpectedly at login screen, but not after login.

crwdns2934197:0crwdne2934197:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933315:00crwdne2933315:0

jparks 47

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Maw 18, 2023

edited by author Maw 18, 2023 crwdns2933505:0crwdne2933505:0 jparks

Question 17

1 crwdns2930801:0crwdne2930801:0

Red borders around the display

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

crwdns2931737:0crwdne2931737:0

Maw 13, 2023

answer edited Maw 13, 2023 crwdns2933505:0crwdne2933505:0 Dan

Question 18

1 crwdns2930801:0crwdne2930801:0

What is the arrangement of diagnostic LEDs?

crwdns2934195:0crwdne2934195:0 iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Justin Castle 4,4crwdns2936485:0crwdne2936485:0

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Kho 30, 2023

commented Kho 30, 2023 crwdns2933505:0crwdne2933505:0 Justin Castle

Question 19

2 crwdns2873741:0crwdne2873741:0

Mac Won't start up

iMac Intel 27" Retina 5K Display 2020 crwdns2933315:02crwdne2933315:0

A2115

crwdns2931217:0crwdne2931217:0

Sun 16, 2025

answered Sun 16, 2025 crwdns2933505:0crwdne2933505:0 A2115

Question 20

1 crwdns2930801:0crwdne2930801:0

unable to read last block of this device cant reset my iMac

iMac Intel 27" Retina 5K Display 2020 crwdns2933313:01crwdne2933313:0

Dan 490crwdns2936485:0crwdne2936485:0

crwdns2931217:0crwdne2931217:0

Sun 31, 2023

answered Sun 31, 2023 crwdns2933505:0crwdne2933505:0 Dan

crwdns2944620:0iMac Intel 27" Retina 5K Display 2020crwdne2944620:0

iMac Intel 27" Retina 5K Display 2020 crwdns2944634:0crwdne2944634:0