MacBook screen cracked - Apple 13.3 MacBook Intel Core 2 Duo 2.4GHz, 2GB/250GB/SuperDrive - Black Mac Notebook

SOURCE: macbook wont turn on

Dont buy a new one as we may be able to repair. These boards are Not Complex by Industry standards and weve had excellent luck tracking and repairing them. (So Glad Apple went Intel).. Talk soon...

SOURCE: Macbook Screen Error

Does it only show up when the computer is on? There were a few reports of several MacBooks having video card issues that caused this problem. Take it to an Apple store and have a Mac Genius look at it to confirm.

SOURCE: MacBook Screen Problem

Hi there
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?

Paul

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:
/sbin/fsck -fy
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:
reboot
and hit enter. The system will then reboot and should boot into OS X without issue.

SOURCE: the left speaker of my

something could have gotten into the speaker and touch the membrane hence the crackling when the membrane moves around.you can try to blow it out with a compressed aire can. if that fails, would assume your speaker is broken somebody has to open the Macbook and replace the part. If you want to pay to have somebody do it for you there is a third party Macbook Repair Service. However, if you want to do it yourself, the part is available on ebay. Here's an Macbook Repair guide. Maybe a tech savy friend can do it for you.