Display Backlight won't dim after HDD replaced. Brightness near 100%I put an SSD in my Early 2009 iMac 24" after the old HDD failed. I don't recall damaging anything during the repair, but...
Answer to "Why can't I send texts to my partner?"If I may ask, what kind of phone is your partner using? If he used to have an iPhone as well, but now is something else, then he will need to deactivate iMessage. If that's the case, have him go to this link: https://selfsolve.apple.com/deregister-imessage Hope that helps!