820-01061 iMac 2017 4K grafik problem

[Dozer]

hi,
got the imac working like it should be but sometimes it has some graphical problems. i didnt found in the forum or anywhere else an issiu like that. so i replaced the mainboard.

now, yesterday i got again an imac, same board same problem.

so this should be a common issiu, looks like gpu problem but i cant belive that. did somebody hearde that already ?

 

[Mac Tech]

hi,
got the imac working like it should be but sometimes it has some graphical problems. i didnt found in the forum or anywhere else an issiu like that. so i replaced the mainboard.

now, yesterday i got again an imac, same board same problem.

so this should be a common issiu, looks like gpu problem but i cant belive that. did somebody hearde that already ?

yes, they also suffer from graphics problems

 

[Dozer]

ok, thanks, so i replace the mainboard here as well