- #MAC DESKTOP SCREEN DISPLAY PROBLEM UPDATE#
- #MAC DESKTOP SCREEN DISPLAY PROBLEM PASSWORD#
- #MAC DESKTOP SCREEN DISPLAY PROBLEM FREE#
Computer still accessible over the network.
#MAC DESKTOP SCREEN DISPLAY PROBLEM PASSWORD#
When turned on this morning it waited until the user password was entered (left for a minute), but as soon as the desktop appeared after the password entry, it was black within a couple of seconds.ĭouble checked the screen with a light and could not see anything. We have been away all weekend and the iMac has been switched off for three days.
#MAC DESKTOP SCREEN DISPLAY PROBLEM UPDATE#
An update that may confuse more than help.Īfter reading through everything I could find on here and on the Apple support forums, I thought that I had better go through all the possible self help options again before taking the iMac to the Apple Store and finding that it wouldn't show the fault.
Doesn't hurt to ask! If you still have an independent Apple-Authorized service shop somewhere close to you (there still are a few), then that's where I would try first.
#MAC DESKTOP SCREEN DISPLAY PROBLEM FREE#
Some folks here seem to get the idea that Apple service is always tight-fisted, but there are (perhaps anecdotal) stories about getting free repairs. Those are likely failures, and you should end up spending 3 - 400 dollars, maybe less.Īnd, the video card is replaceable, too, and will be higher, depending on which one you have.Īnd, there's the possibility that the screen is failing, which will be considerably more.Īnd, it may be worth your time to talk to a "genius", as there are occasional service programs, that can provide repairs, if you ask for them. Neither of those two parts are terribly expensive, and not too difficult to replace. In that case, there's a backlight board that may be failing. You can tell because you will still have visible screen elements (Menubar, Dock, windows, etc) if you look carefully, perhaps by shining a bright light into the screen. You may run into this problem even after macOS Sierra 10.12 and macOS High Sierra 10.13, but know that you will be able to apply this method again if that happens.Did you determine if it's really the screen? or is it simply the backlight? Type in your password and you're back in business. That's normal, even if you previously bypassed it. You will have to press the Enter/Return key after each one. You then need to type the following commands:
Then, quickly press the Command and S keys, to get you into the single-user mode.) Hit the Command, Option, P and R keys at the same time, right after you power it on, and wait until you hear the startup chime for the third time before letting go. (I've seen someone recommend that you reset the PRAM three times before booting in the single-user mode. If you did it right, you should see a whole bunch of lines on the screen in what is a Terminal-like interface. That's done by pressing the Command and S keys at the same time, right after pressing the power key. Next, you have to boot your Mac in single-user mode. Pressing the power key for a couple of seconds will do the trick. First, you need to shut down your Mac, if it's powered on. You can try to reboot or reset the PRAM and SMC - the first things that Mac users can try when something isn't working right - but that will not fix it. It is not clear what exactly is causing macOS to act up after installing an update, but it rears its ugly head after powering on the Mac.
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