Question about Apple MacBook Mac Notebook
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Posted on Jan 02, 2017
SOURCE: MacBook Screen Problem
If I understand you correctly from start up the screen is dim but does brighten up after time? But now after start up you are getting a flicker how ever a restart solves this.
On the dimming issue. Check your energy saving settings and brightness key is working OK.
The flickering is a bit of a concern.
Just a couple of questions.
Are there any dead spots on the screen? Areas where there are no pixels.
When you tilt the screen forward and backward, does this effect the brightness or flickering?
Posted on Sep 04, 2008
SOURCE: APPLE MACBOOK
If you get the Apple logo with spinning lines underneath it but not getting past this stage then the hard disc is being seen but something is failing in the boot process, causing it to stall.
Most likely this is a case of incorrect file permissions which is easily solved.
There are 2 ways of doing it, depending on whether you have an OS X install disc to hand or not.
IF YOU DO HAVE AN OS X INSTALL DISC:
Insert the disc into the DVD drive, power on the Mac on after hearing the chime hold down the C key. This forces the Mac to boot from the DVD. After a few minutes you'll get a screen asking which language you wish to use as the main language; select English or whichever is appropriate for you.
On the next screen the Installer box will appear. Ignore this and instead on the menu at the top of the screen select Utilities -> Disc Utility. Once this has loaded select your hard drive on the left hand pane and then first click "Repair Disc" and once that has finished click "Repair Permissions".
Once these have completed successfully reboot and OS X should load up fine.
IF YOU DON'T HAVE AN OS X INSTALL DISC:
This is a bit more tricky. You have to boot into single user mode. To do this power on the machine, and after the chime hold down Cmd (Apple key) and S together. The screen will turn black and an a load of white text will start appearing and scrolling upward as the system loads. Basically this is what happens behind the Apple startup logo, only in single user mode rather than multiple user mode.
After a few moments the text should stop scrolling and you should see a prompt which looks similar to:
localhost: / root#:
Note that localhost is the name of your computer so will possibly be different to "localhost". At this point type the following EXACTLY including spaces, capitalisation and dashes etc:
now press enter, then type:
/sbin/mount -uw /
now press enter then type:
diskutil repairPermissions /
and press enter. It may take a few minutes to repair the disc's permissions, but once complete you should have the
localhost: / root#:
prompt again. Now type:
and hit enter. The system will then reboot and should boot into OS X without issue.
Posted on Sep 23, 2008
SOURCE: beeping before booting
probably the RAM. Take it out and put it back in to check. You will need some RAM to boot, so try each stick separately if you can. I'm guessing though that you'll have to get at least one other stick of RAM to check. You'll probably find that one is bad. It's probably covered for life, but that would be a good reason to upgrade it.
Posted on Nov 19, 2008
SOURCE: My apple macbook won't start
the beep pre-boot is signaling a kernel panic. It could be bad ram or something else, it's hard to tell without hearing the beep (they signify different things)
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
taken from http://www.welovemacs.com/whdoallthbme.html
So depending on the beep, it means different things. However in any case I'd suggest taking it to an Apple Authorized Repair Facility. Unless you feel comfortable with assessing the proper solution on your own
Posted on Feb 28, 2011
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