Screen goes dark to bright and bright to dark constantly.

Why is my display going from dark to bright and bright to dark while I am using it? I have it set for manual screen lighting control but it doesn't make any difference.

SMC and PRAM reset
Step by Step to fix your Mac

Similar Messages

Nokia N8 screen going OFF during call in bright su...

Hello Friends,
My N8 screen is going black whenever I am making calls in the bright sunlight. So I cannot view the dialler at all and unable to end the calls. This problem really annoys me a lot. Anyone expereinces this problems. Please help me in this regard.
thank you very much,
Shijo

Ja. it has funny tendencies. The proximity sensor turns the screen off when you bring the phone close to your ear then when you remove it could take a couple of seconds for it to come back on.
I did notice it's a bit worse when in bright sunny conditions. If the key pad was locked when you received the call it can also cause make that lag a little longer
Show your appreciation. Hit that kudos button real hard

Since installing Firefox 4, screen goes black when dormant and will not automatically reopen on first try.

Since installing Firefox 4, if I leave the computer (desktop with a Viewsonic VG1930wm monitor), the monitor will go to blackscreen...not the starfield screensaver. If I move the mouse, the screen will only momentarily go back to the last desktop...and then almost immediately black screen again. I typically have to turn the monitor on and off five or six times...and move the mouse each time, before it will stay open to the desktop. Any ideas?

Standard troubleshooting steps in order are as follows:
Power the iPad off and on.
An iPad reset, which is done by pressing and holding the home button and the sleep/wake or on/off button simultaneously until you see the Apple logo and then release.
Restore your iPad with iTunes from your iPad's backup.
Restore your iPad with iTunes as a new iPad or not from your iPad's backup.
If no change after the last step, your iPad has a hardware problem.

Skype screen goes white during calls and video calls

Hi,
I'm using Windows 8.1 and recently after the latest skype upgrade I'm getting a white screen during regular calls and during video call while I can talk and hear the other side and on the video call the other side can see me. Important to mention that I see the contact list on the left side.
What should I do in order to fix it? (tried reinstalling skype)
Thanks a lot in advance!

Please, run the DirectX diagnostics tool. Go to Windows Start and in the Run box type dxdiag.exe and press the OK button. This will start the DirectX diagnostics program. Run this diagnostics and save the results to a file. Please, attach this file to your post. Be aware that you will have to zip this file before attaching it here.

Dropped my phone in the toilet, screen won't come on and LED is staying constantly on.

Yesterday, my phone fell out of my back pocket into the toilet. I quickly picked it up, and wiped it off then tried to shake all the water out. A few minutes later, the LED flash light came on, but the screen (which was already cracked before i dropped it, as was the back of the phone) stayed black and wouldnt turn on. I left it sitting on my dresser, and a couple hours later the light went off. A few hours after that, i put it in a bowl of rice. this morning i took it out, but the screen still wouldnt turn on. I plugged it up to my computer (which didnt recognize it was there) and after about 15 minutes the light came back on, but the screen still wouldnt turn on. I put it back in the bowl of rice.
Is there any hope it might turn back on?

i have done the same how ever mine is basically new buuuut i don't have any rice soo just wrapped mine in a towle and put it on my heater .... that wont damage it ...right?

NVIDIA brightness and suspend issues on VAIO

Hello,
I have problems with NVIDIA driver (assuming) and I searched similar topics on forum but still couldn't solved. I'm on ARCH 3.1.5 Xfce, installed nvidia-290 proprietary driver and nvidiabl from AUR. No swap partition and using lightdm. Laptop model is VAIO VPCF132FX, resolution at 1600x900.
blank screen when switching to tty1 - tty6 but I can run commands in virtual consoles (tried log in and reboot from tty1 not seeing just typed). I added vga=xxx in grub kernel line and it's changing resolution while booting but switch to ttys still gives blank screen. I think it's happening after started X. If I doesn't start Xfce I can switch.
can't resume from suspend. I think it suspends successfully and when try to back it freezes, no inputs from keyboard (tried some shorcuts, numlock, password etc) and blank screen. After few seconds fan reaches at it's loudest and I ended up with 5sec turn off. Is it hardware related issue or kernel (or X lightdm Xfce). Should I use laptop-mode-tools to get suspend work or missing something?
if I added
Option "RegistryDwords" "EnableBrightnessControl=1"
to "Device" section in xorg.conf, keyboard shortcut of brightness and brightness-applet are working. It has 8 level of brightness and only top 3 of them works properly, if it gets lower from there screen blinks few seconds and back to highest brightness. I removed that line from xorg.conf, installed nvidiabl it works great except keyboard shortcut and brightness applet. How do I get shortcut and applet work on Xfce with nvidiabl? Also shortcut is working when numlock is off, is there any chance to work either numlock on or off?

Hi Dave, see if this might be of use...
Go to System Preferences > Universal Access and down in the Display: section make sure that the Enhance contrast: slider is all the way to left to Normal, or more to the right for less Contrast.

Since upgrade, my ipad screen goes black

Since upgrading my ipad2 to version 7.1 my screen goes screen goes black very often and I have to return to whatever I was doing and start over. Saw various online discussions and they advise restart or change settings and that doesn't help. PLEASE anyone.

Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.) No data/files will be erased. http://support.apple.com/kb/ht1430
Frozen or unresponsive iPad
Resolve these most common issues:
    •    Display remains black or blank
    •    Touch screen not responding
    •    Application unexpectedly closes or freezes
http://www.apple.com/support/ipad/assistant/ipad/
iPhone, iPad, iPod Touch: Troubleshooting Touchscreen Response
http://support.apple.com/kb/ts1827
iPad Frozen, not responding, how to fix
http://appletoolbox.com/2012/07/ipad-frozen-not-responding-how-to-fix/
iPad Frozen? How to Force Quit an App, Reset or Restart Your iPad
http://ipadacademy.com/2010/11/ipad-frozen-how-to-force-quit-an-app-reset-or-res tart-your-ipad
Black or Blank Screen on iPad or iPhone
http://appletoolbox.com/2012/10/black-or-blank-screen-on-ipad-or-iphone/
What to Do When Your iPad Won't Turn On
http://ipad.about.com/od/iPad_Troubleshooting/ss/What-To-Do-When-Your-Ipad-Wo-No t-Turn-On.htm
iOS: Not responding or does not turn on
http://support.apple.com/kb/TS3281
iPad: Basic troubleshooting
http://support.apple.com/kb/TS3274
 Cheers, Tom

Screen goes to very large numbers

Screen goes to different languages and large numbers

Check Settings > General > Accessibility > all options should be OFF here.
Note: You might need 3 fingers to navigate.

Phone screen goes blank

It seems that after 911 fix(update) my phone screen goes blank after dialing and to enter voice mail I code have to keep pressing unlock button for screen to return for split second for each code digit. Has anyone else seen this behavior?
Thanks,
enr

I noticed exactly the same thing. It's a struggle to retrieve my voicemail because the screen goes blank and by the time I finally get to finish entering my voicemail password, the Verizon system times out and says goodbye.
COME ON VERIZON, MY PHONE IS NOT USEABLE LIKE THIS !!!
One thing gets fixed, 3 things get broken. Enough already.
Instead of giving us half-a*s "band-aid" updates, let's get us updated to FROYO and fix the darn phone the right way.

Screen goes red

Hi
The screen goes red in preview and after the movie is
published. It only seems to happen on slides that contain animation
/ movie clips.
Has anybody got a solution to this?
Thanks

You said...
quote:
I think that if the file is too large, and if the resources are
exhausted, you get something called the "Red Screen of Death",
equivalent to the "Blue Screen of Death".
The behavior that is being described here has nothing
to do with resources, nor with the size of the file ... did you
perhaps post this reply to the wrong thread?
You said ...
quote:
I am having the same issue as PaulBennett. How do I know what to
change the display time and frame rate to, and how do I know what
frame to change?
The changes are usually a "season to taste", or "trial
and error" thing when changing frame rate or display time. There
may be a more scientific method, but someone else will have to step
in for that. I have had success changing display time by as little
as a tenth of a second (0.1).
Ciao

HI all, i'm using Mac Pro 15" Retina. My screen goes darker and after brighter after a while? How to fix it?

HI all, i'm using Mac Pro 15" Retina. My screen goes darker and after brighter after a while? How to fix it?

System Preferences > Displays.
De-select "Automatically adjust brightness"

My iMac screen goes bright and dim randomly, any idea why?

my iMac screen goes bright and dim randomly, any idea why?

Sounds like a power issue.
Try Resetting the System Management Controller (SMC)

Ipod touch 4g screen gets brighter and darker and it just does randomly

screen gets brighter and darker randomly

Go to Settings>General Wallpaper and Brightness and turn off Auto Brightness.
Next:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Reset all settings
Go to Settings > General > Reset and tap Reset All Settings.
All your preferences and settings are reset. Information (such as contacts and calendars) and media (such as songs and videos) aren’t affected.
- Restore from backup. See:
iOS: Back up and restore your iOS device with iCloud or iTunes
- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar

When I boot into Win7 I see the windows boot up logo, the. I see my mouse and the screen goes black! It goes black in the login screen, I type my password and I hear the login sound but when I press F2 the brightness won't change! Please help!!!

When I boot into Win7 I see the windows boot up logo, the. I see my mouse and the screen goes black! It goes black in the login screen, I type my password and I hear the login sound but when I press F2 the brightness won't change! Please help!!!

Hi Emma,
Thank you for using Apple Support Communities.
I understand that your Thunderbolt display is just showing a black screen when you boot your computer. The following article should be of help in troubleshooting your display.
Apple computers: Troubleshooting issues with video on internal or external displays - Apple Support
Cheers,
Jeff D.

Display alternates between dark and bright

I have several issues but I suspect somehow they are all related as they all began about the same time, within about an hour of each other, which was maybe a week ago.
Periodically, my display slowly cycles between dark and bright. Sometimes the display will suddenly go to sleep on it's own, usually after a period of about 20 seconds of me not doing something and when I wake it up the display is quite dim. Other times the computer goes to sleep (not just the display) requiring me to log back on. I use password for startup. I open the display settings after log-on and the brightness slider has somehow moved way over to the dark end (left). I slide it up to where I like it and soon it does it again all by itself again after a very short period of inactivity. I have noticed that if I leave the brightness control alone (dim) without readjusting it it seems to take longer for the other issues to develop. I would normally place the brightness slider just under half way up. My sleep time settings are currently: computer - 1 hr, display 15 min. That is plugged in which is pretty much the only way I ever seem to use it ... plugged in.
Another issue is an occaisional rapid beeping. It's the same low beep that you hear when you try to do something stupid and the computer is telling you you've made an error. The difference is this is a long, unending string of rapid beeps; I'd estimate maybe 15 - 20 beeps per second. The sound does not stop. I have to mute the speakers to shut it up. I have not yet been able to determine a recognizable pattern of common variables for when this happens. The other day when the computer went to sleep by itself and I woke it and tried to input my password and I saw that the input bar was filled with black balls as if it was remembering my password which I did not like but when I hit enter the logon dilaog box shook, the entry field emptied and refilled on it's own. I held the backspace key for several seconds and nothing seemed to happen. I used shift/command/arrow to highlight the entire string and deleted it but as soon as the characters were deleted I saw the input line quickly fill back up again one ball at a time at roughly the same rate as the beeps. Then it occured to me that the beeps were similar to those you would hear if you held a key down and filled an entire entry field with a hundred of a particular character and was still holding down the key long after the field was full. My first thought was that a key was stuck down. Not so. Each and every key is free to move and functions normally.
Last night I closed the lid to put the computer to put it sleep before I went to bed. About 3 hours later I was awakened by the sound of the rapid beeping. I got out of bed and went to the computer and opened the lid to find the same input line black balls issue but this time it was accompanied by the beeping and the display was also cycling between bright and dim. As it was the middle of the night I killed the machine by holding down the power button and forcing a shutdown. This evening I decided to do the upgrade from 10.9.1 to 10.9.2 hoping that might help but it did not. I have not heard the beeping since the upgrade but the display is still cycling, which was the first thing I noticed when all of this began.

Turns out it may have been sofware issue. I suspected software anyway because rebooting could temporarily cure it. I spoke to an Apple Service and Support person on the phone. She went through a fairly lengthy process with me to evaluate the machine and determine if it was hardware or software related. The results of those steps did not lead her to any concrete conclusions but she was able to hear the beeping issue happening in real time. She guided me through the steps of O/S recovery and now several hours later the machine appears to be functioning as it is supposed to. Typically the issue(s) would show up after maybe twenty minutes or a half hour after a hard boot. I am to monitor the thing for the next week or so watching for any signs of the issues slowly returning.
Here's keeping my fingers crossed.

Screen goes dark to bright and bright to dark constantly.

Similar Messages

Maybe you are looking for