crwdns2934241:0crwdne2934241:0 Hoang An Tran

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My iMac suddenly have 2 blue dots on black screen

crwdns2934249:0crwdne2934249:0:

hi everybody. i’m using an imac 5k 2017 with catalina 10.15 os. yesterday, i suddenly have 2 blue dots when i select black as background color (another color didn’t have that  happen). does anyone have experience handling this?

[image|2035751]

[image|2035752]

crwdns2866306:0crwdne2866306:0:

iMac 27" 2017

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open