How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Mike Your Own Question
Mike
Mike, Mac Medic
Category: Mac
Satisfied Customers: 8869
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
25267123
Type Your Mac Question Here...
Mike is online now
A new question is answered every 9 seconds

I turned on my computer and get nothing but a white screen.

This answer was rated:

I turned on my computer and get nothing but a white screen. Turning it off and on again results in the same thing.
Try this:
Resetting the SMC & PRAM for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
6. Press and hold the Command-Option-P-R keys before the gray screen appears.
7. Hold the keys down until the computer restarts.
8. Release the keys.
Customer: replied 4 years ago.

The computer restarted after I held down the keys, but still came back up with a white screen.

OK do you know what system version you are using?
Customer: replied 4 years ago.


sorry, no. It is a desktop unit which has the computer in the monitor. Was purchased about 1.5 to 2 years ago.

Ok.

Put the current operating system disk in (the disk that came with your computer unless you have upgraded, in that case use the new system disk) and restart holding down the letter C key until you see the Apple logo. Choose your language then you get to the install screen DO NOT INSTALL, you will see at the top of the screen a Utilities menu drop down. Go the Disk Utility, Highlight your hard drive (usually Macintosh HD) and click on Verify Disk on the right. If that is OK and only if that is OK click on Repair Permissions. If Verify Disk is not OK try to Repair. If Repair is successful then Repair Permissions if it is not successful let me know.
Customer: replied 4 years ago.


cant find disc, but while I was looking, the screen turned blue, then the system just came back on line.... weird. Any ideas if this will happen again?

First I need some information and I also want you to check some things that may or may not be affecting the situation :

Please go to the Apple logo on the upper left of the screen, go to About This Mac (DO NOT Select More Info), and tell me the Version (under Mac OS X), the Processor and the Memory, it is all right there.

Click on the first icon in the Dock the "Finder", then click on Go at the top of the screen, you will see a drop down menu, go to Utilities. When that opens double click on the application called Disk Utility. When Disk Utility opens you will see your hard drive (usually Macintosh HD) on the left. Highlight your hard drive and click on Verify Disk on the far right. If that is OK in green type, then click on Repair Permissions on the left.

Note: If Verify Disk is not OK try to Repair. If Repair is successful then Repair Permissions if it is not successful let me know.
Customer: replied 4 years ago.


version is 10.6.2


 


verifying the hard drive it gave me an error: this disk needs to be repaired .... then use Disk Utility to repair this disk. It wants me to start up my computer wiht another disk (such as my Mac OS X installation disc) then use Disk Utility to repair. But as I stated, cant find that disk. What now?

Do you have a backup?
Customer: replied 4 years ago.

no, I have a disc that is for my lap top which says "13-inch macbook pro" Mac OS X install DVD

I highly suggest you have a backup before trying this or any disk repair, either with the original system disk or using this method. Use the disk if it says 10.6 on it or go to link below and download Applejack open and install, then restart and hold Command and S keys. When you get to the command prompt type

applejack auto restart


then hit Return.

http://www.macupdate.com/app/mac/15667/applejack

Customer: replied 4 years ago.


ran applejack which seemed to process fine. Then went back and did another verify disk and it still tells me thant I have an invalid directory item count (it should be 32 instead of 31) and that the volume macintosh HD was found corrupt and needs to be repaired. wants me to instal utility disk again. Should I just run applejack again?


 


the other disk was a leopard disc which the computer said I could not use on this machine.


 


 

You can try but if the Applejack will not fix it there is still a chance, though not a guarantee that a third party utility like Disk Warrior might be able to repair it but you would need another mac to use the download or you will need to get the boot disk shipped to you before you can try it. Otherwise you will have to reformat the drive.
Customer: replied 4 years ago.


how do I get a back up disk?

Customer: replied 4 years ago.


how do I get a back up disk?


 


Ran applejack a second time, now the disk check comes up green. Then ran permissions and that seemed to go fine. Thanks so much for your help. reply so I can get you rated and paid!

Ok sorry, thanks.
Mike and 2 other Mac Specialists are ready to help you

Related Mac Questions