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Version actuelle par : Jos ,

Titre:

Black Screen (bricked) after Big Sur update : also common for iMac?

Texte:

Hi, I saw an add for a mid 2014 21,5” imac that was bricked after an attempt to update to Big Sur.
 
Mine is a Late 2015 and it has only one LED on the motherboard (power ok) and also does nothing. Can this also be the Big Sur faulty update situation ? I got mine second hand, don’t know the history.
 
I guess it needs a new logic board. Or should I try to change the processor first as it would have the 2nd LED lit if it would be a GPU problem. Thank you for your reply.
 
=== Update (02/05/2021) ===
 
Just realized the CPU is soldered to the board.

Appareil:

iMac Intel 21.5" EMC 2889

Statut:

open

Contribution d'origine par : Jos ,

Titre:

Black Screen (bricked) after Big Sur update : also common for iMac?

Texte:

Hi, I saw an add for a mid 2014 21,5” imac that was bricked after an attempt to update to Big Sur.

Mine is a Late 2015 and it has only one LED on the motherboard (power ok) and also does nothing.  Can this also be the Big Sur faulty update situation ? I got mine second hand, don’t know the history.

I guess it needs a new logic board. Or should I try to change the processor first as it would have the 2nd LED lit if it would be a GPU problem. Thank you for your reply.

Appareil:

iMac Intel 21.5" EMC 2889

Statut:

open