MacBook Screen Problem

just turn off your Macbook. wait in seconds and turn on.

Go in to the "applications>utilities" folder. Run the "Audio/MIDI Setup" program. Insure the audio out is actually going to the audio out.

Sounds like the screen cable is either partially connected, loose or has failed.

Hi Ken. If everything works but the picture, it would suggest that the video connector is not properly mated on the motherboard.

This has also happened to my Macbook Pro - nothing would work, so i basically pressed the power button until it closed down and waited a few minutes and turned it back on. The problem ( touch wood) did not come back again yet. Good luck!

Your MacBook air has an ambient light sensor that is right next to the iSight camera. You can turn the brightness up or down from the keyboard (F5 and F6). You can also turn this off completely from system preferences. Go to the Apple menu > system preferences > keyboard

White screen issues on your Macbook are more often than not, an indication that you may have a connected peripheral or device which may be hindering your Macbook's normal start up function

What you need to do first, is remove all peripherals from (printers, scanners, USB drives etc.) and then reboot your Macbook.

If your Macbook starts up normally without a white screen, leave all the peripherals disconnected and see if you can proceed to run all of your software updates, in Apple menu>Software Updates, first, including updating to the final version of Mac OS X 10.4 Tiger, 10.4.11.

Once all of your updates are completed, then you will need to go through a process of elimination by connecting one peripheral at a time, then properly shutting down and restarting your Macbook with each device, to see if your Macbook goes to a White screen.

Depending on the number of peripherals you have normally connected to your Macbook, this may seem a little tedious at first. But considering how bothersome a White screen is, it will be worth it solving the mystery of which peripheral is causing the white screen and failure to boot up normally.

If it turns out that one of the devices you had connected was in fact, causing the white screen, this will be the opportunity for to research online, visiting the affected device's manufacturer's website or even use Google, to confirm if there are any known issues and/or updates available to address that issue.

There are other variables which can come into view with a white screen issue, but this is a good way to start in terms of working toward a viable solution to this issue with your Macbook.

I hope this helps, let me know if you have more questions.

Regards,

-Mactechtrainer
Sr. Mac Support Specialist

It means that the computer can't find the hard drive portion that starts the computer into OS X. It usually indicates a dead hard drive, though sometimes it can be fixed by running your OS X install disk and using the repair function on it. If you don't feel comfortable doing this, find a good repair tech on Craigslist or through your local search.

I've experienced it, but after a while the problem dissappeared again.....

first there could be many meanings of dims with a laptop screen one is backlight has turned off and it is difficult to see.  if that is the case use you brightness key to check if it is up, if it is more likely your inverter has gone up and in worse cases the screen. it may also start bright then change dim while loading
there is also the feature on mac to automatically dim the screen a little when unused for a set time.  to change this go to system preferences, go to energy saver, click show details, then move to options, and uncheck the the box that says "Automatically reduce the brightness of the display before display sleep".
i hope this is what you are talking about.