Let us know the outcome, and we can go from there if needed. On either the first or second login window, you should see “Safe Boot” in the menu bar. Turn on or restart your Mac, then immediately press and hold the Shift key until you see the login window. Start up your Intel-based Mac in safe mode 1. The display should now stop going black randomly. Finally, power on your monitor and also start the PC. Wait for about 30 seconds before re-establishing the connection. Then, unplug both the data and power cables. The guidance needed is found here: Start up your Mac in safe mode Next, power off the monitor using the dedicated button. When your Mac finishes starting up, you might need to adjust any system settings that were reset.Īlso, to rule out any issues that may be related to a specific app or software, we suggest booting the set in safe mode. Here are the steps you should follow: Press Win + R to open the Run command dialog box. You can also resolve the black desktop background display issue by configuring the Ease of Access settings. For example, you might hear a startup sound more than once, or see the Apple logo more than once. Configure the Display Settings via the Ease of Access Center. Release the keys after about 20 seconds, during which your Mac might appear to restart. Turn on your Mac, then immediately press and hold these four keys together: Option, Command, P, R. Follow the steps from the Apple Support article: Reset NVRAM on your Macġ. First, we suggest resetting the NVRAM, as this can help with most display issues. I do not believe that anyone should have to pay for Apple care for 1-3 years after the purchase of a machine for over 2000 - it should just work for at least 3years for this price and I will be taking a case to the consumer courts to say the same if they attempt to make me fork out for the repair of an inferior product at a premium price.Welcome to Apple Support Communities. really, can't a person smoke in the same room as a computer anymore? They also tried to blame the fogging on the back of the glass on the user of the computer smoking. At the same time I noticed dim/dark spots along the bottom of my LCD display, almost as if alternate LEDs in the backlight werent coming on (a bit like the. I despair, but I refuse to throw good money after bad and if I am spending any more money on this machine it will be to pay for the application to the small claims court for the cost of the repair. Basically, whilst installing a new hard disk drive, I managed to damage a connector on the cable that goes to my Bluetooth/Wifi/iSight (i lost all three). They tell me they will be charging me 70 just for the diagnostics and still haven't been able to find the problem with my screen (apart from the fogging on the back on the display - which has ben replaced just over a year after purchase for free- it now just cuts out - just the screen, I can control from my laptop and save files I'm working on etc) though they found a problem with the hard drive and then lost the problem again. Yup, I'm in the same boat :-/ just left my 27 inch iMac (purchased 2010) into the store. Why do we have to pay for our consumer rights? I'm guessing he's thinking that if there's still a picture on the external monitor that the GPU is good, but the backlight is bad. He suggested hooking up an external monitor the next time it happens to see if it's still producing a picture. It looked like it might have some damage (you could see what looked like a little bit of burning around a couple of the electrical points). He took the display off and looked around - he said it might be the module that controls the backlight. Step 3: In the System Preferences window, click on ' Dock & Menu Bar. Step 2: From the drop-down menu, select ' System Preferences. Step 1: Click on the Apple menu in the top-left corner of the screen. I took it to our local Mac repair guy and he said he's never encountered this problem before. If you fall into the latter category and want to increase the display time on your Mac, here’s a simple tutorial to help you achieve just that. If I do an SMC reset (and NVRAM reset) I seem to be able to run the display brighter for a longer period of time. It's just that I can't see the display on the iMac. I have TeamViewer installed and I'm able to view the monitor from my iPad - I can launch apps, etc. I've found keeping the brightness at the lowest level makes the display work longer - as soon as i turn it up: blackness again. After that it may last anywhere from several hours to only seconds before it goes black again. I've found the only solution to bring it out of it's blackness is to put the computer to sleep (Command-Option-Eject) and then wake it right back up again. I've been suffering the same problem for the last several months (of course out of warranty).
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