disco pixels and screen twitching after replacing HD for SSD
Today I replaced in my iMac EMC 2390 my 3.5 HD for a samsung 850 EVO SSD. Now I have some white pixels turning on and off almost like snow, random. And some now and then there is a partial screen twitch horizontal.
What did I do wrong, I follow the guild to the letter.
Who can give me some advise?
Is this a good question?