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1

To me that looks like possible hardware problem (the GPU). You can try the Safe mode to see if the problem persist. Also you can try and log in as different user. You can reset the PRAM, and run the Apple Hardware test. Last not least you can reinstall the OS. All above will test for software problems. There is one hardware test you can do and it is to ...


0

Go to screen saver then activate the "display off" in hot corners.


0

Normally if you look in the About this Mac, then look how is it identifying the monitor. What does it say about it. Usually that information will tell you that something is wrong (mostly the cable).


3

According to MacTracker.app: Display Connection 1 - HDMI port or Thunderbolt digital video output Display Support Supports an HDMI-compatible device while using one Thunderbolt display or support for two Thunderbolt displays Display Modes Dual display extended, video mirroring, and AirPlay Mirroring External Resolution Up to 2560 by 1600 ...


-1

Make sure that you quit the System Preferences first. Re-open "System Preferences" and then cmd+option click on "Displays". You should now have access to the Rotation setting. The quitting of the System Preferences is needed. At least, this is how it works on my Mac Book with OS X 10.10.


0

I have been using 4K monitors with an Early 2013 Retina Macbook Pro since August 2014, and have an issue which is consistent across both 4k Monitors - the screen will go blank for a few seconds sporadically. It doesn't happen often enough for it to be a big issue, but it can be annoying. Most of the time i run at 2560 x 1440, but i can go up to 3840 x ...


1

Finally someone who realized a free app to disable monitors: DisableMonitor (on GitHub)


4

A screen is manufactured at x pixels * y pixels, probably measured in microns or nanometres, which will give a final measurement for x * pixels and y * pixels in millimetres. Pythagoras figured out that the diagonal measurement of a right-angled triangle [the hypotenuse] is the square root of the sum of the squares of the other two sides…. again this would ...


0

Since the the MacBook Air does not have VGA plug I would say ... your Thunderbolt to VGA converter is not the proper one. That would be also the reason why it does not correctly detect the HP monitor. Try the Thunderbolt to DVI adapter instead.


0

I have seen the static on the Apple Cinema LED Display connected to a Mac Mini Late '09 using mini-DVI to Mini DisplayPort Kanex converter. What helped me was the order in which I connected the devices after the problems occurred. Not sure what monitor and what converter you use and whether these steps would help; however, what I learned is that these ...


1

This is a bit of guesswork, as I don't have a dual GPU machine to test with - but this works across even different computers using the same screen. The difficulty may be in persuading the system to swap profiles at the same time as it swaps GPUs. The way to do this accurately would be with a hardware colorimeter, designed to test & balance the screen, ...


2

Have you tried resetting the SMC? Shutdown your Mac Connect the power cable Press and hold the LEFT Alt + Ctrl + Shift keys While still holding the keys above, press the power button Besides that, could you check what color profiles you have installed and report back? Removing faulty profiles and rebooting might help solve your issue as well. ...


1

Try System Prefs > Mission Control > Displays have separate spaces.


0

Hadn't seen this solution anywhere which worked for me and a coworker. Check to see if there are any updates for your mac. I had a security update that I was not aware of so I updated and restarted without my monitor connected and it started up just fine.


3

Yes - add a Mini DisplayPort port to your iMac. Should only take an engineer and a machine shop to accomplish. In all seriousness, the mini-DVI port on your iMac is an output-only port, whereas the Thunderbolt/Mini DisplayPort ports also accept input. No amount of software, cables or dongles will change that.


1

Yes, that looks correct. If you want some other examples, then take a look at the newegg site.


0

I have had the same problem with Maverick (in clamshell mode) / external monitor (Samsung SyncMaster 2443) when I lock my screen and use my bluetooth mouse or keyboard to wake up the computer. I was able to fix the problem in 2 ways: open the lid, login and unplu, replug the external monitor (pretty annoying) when the multicolor static shows, press ...


-1

I have had the same problem with Maverick (in clamshell mode) / external monitor (Samsung SyncMaster 2443) when I lock my screen and use my bluetooth mouse or keyboard to wake up the computer. I was able to fix the problem in 2 ways: open the lid, login and unplu, replug the external monitor (pretty annoying) when the multicolor static shows, press ...


0

I have had the same problem with Maverick (in clamshell mode) / external monitor (Samsung SyncMaster 2443) when I lock my screen and use my bluetooth mouse or keyboard to wake up the computer. I was able to fix the problem in 2 ways: open the lid, login and unplu, replug the external monitor (pretty annoying) when the multicolor static shows, press ...


0

After my MacBook Pro (15 inch, late 2008, 10.9.5) fell down this morning, I had a similar problem - just that in my case, the flickering was in red pixels, everywhere where a black color was displayed. I rebooted, and on bootup, screen was completely black. I got a small screwdriver, and opened the back (removed battery, unplugged power cable...), then ...


1

I reset the NVRAM on my Mac (aka "zapped the PRAM") and so far it seems to have resolved the problem. This is a simple procedure of restarting the Mac, and holding down the Command, Option, P and R keys once you hear the startup sound. You hold them until the Mac reboots again, then release them. This clears hardware settings that are stored in non-volatile ...



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