My Macbook recently started having the screen go dark while I am using it. I can see that the sleep light is still on but I can no longer see anything on the screen. How do I troubleshoot this issue?

Please help me fix this issue.

I assume this is due to the fact that system detects your internal monitor as default one, and that is there where system sends main data. In order to force system send data to the external monitor, get a mouse and physical keyboard, close MB lid, and then press any key on the external keyboard.
when you get there, go to system preferences/display, and manually move the Apple upper bar to the external monitor, then choose mirror; ultimately, set optimal resolution.

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HT1420 When I try to connect to itunes match, I get an error message that says "We could not complete your iTune Store request. An unknow error occurred (4001). How do I resolve this issue?

When I try to connect to itunes match, I get an error message that says "We could not complete your iTunes Store request. An unknown error occurred (4001). How do I resolve this issue?

I purchased iTunes Match several days ago and I am getting the following error when I try to allow iTunes Match to run. Please advise how to fix this:

TS1702 my ibooks are appearing on my music playlist, but NOT on ibooks for me to view...how do I resolve this issue?

my ibooks are appearing on my music playlist, but NOT in ibooks for me to read, how do I resolve this issue?

This is a concern amoung many corporate users. It's going to take somekind of policy change with apple.
Enterprise support:
Call enterprise support (866) 752-7753 to create a case ID number

Iphone4 screen goes dark while I'm using voicemail

or calling...I suppose it's to save battery but I looked at settings and didn't find anything to adjust it - For instance, I want to place a call to my voicemail on home land line, I do so and then hit the speaker to hear it without holding the phone, the voicemail needs to have some numbers put in but about half way thru the screen goes black - the voice is going on about needing to punch in 1 1 # and I'd do that if I could see the screen= but it's black = if I punch around it comes on again but that defeats the purpose of having the keypad nonhidden = and i end up punching the wrong number anyway [hitting 5 to get the screen back on because I can't see the numbers of course]

My new Macbook Air (Core i5 - mid 2011) Build 11A2063 doesn't have the same problem where the screen goes black while working, but I DO have the major issue of it not waking properly after sleep.
Mainly with the lid open on battery after leaving it for 20 mins, I come back and the thing won't wake. It just sits on a black screen. I'll have to either shut the computer down by holding the power button or close the lid and wait 5 to 10 seconds and then open it back up and THEN the login screen will come on.
I think this is a hardware issue. How would we report this?
And does anyone else have this problem?

HT4528 Since updateing with the new IOS 7.1 on my 4s, I have NO sound coming from my speakers or volume control, but I DO have sound when my phone rings. How do we fix this problem?

I updated my phone last night with the new iOS7.1 my phone worked fine before updating. Since updating, I have no sound from music or videos, but I do have sound when my phone rings. anyone know how to fix this? I have already done a restore that did nothing.

Clean iPhone charging port with toothbrush and small amount of isopropyl alcohol. If still problem the faulty part is charging port assembly with flex cable, lower mic, and connector of home button flex. Apple handles this problem with replacement iPhone 4S with Warranty or AppleCare coverage, if no coverage it is $199.

I was charged for the same app twice, but I only had enough money to purchase it once. I used a prepaid Mastercard, and cannot remove it from my account. I am also unable to download anything from iTunes. How do I fix this?

The "none" option is nowhere to be found, and I can't remove my card. I don't really want to create a new account.

You'll have to pardon my ignorance of some computer terminology; I'm a retired manager and not a computer technician, hence my muddling up of client and server terminology.
Re your comment about Port 339: I did qualify this with (?). As I wrote, it all happened at lightining speed and the guy at the Genius Bar didn't bother explaining what he was doing. Port designation contained 3s and 9s to the best of my recollection.
That said, you seem to be spot on re setting up a 'dummy' client in Mail. I set it up as you suggested and I can send to and receive from this client without a problem. You appear to have identified the solution, notwithstanding the claims of the ISP's 'experts'.
The next problem I have now is sorting out my wife's mailbox that is so troublesome whenever I set it up on Mail.
All the other set-up advice to date yielded a similar result; inability to send from my account to her inbox. Perhaps deleting her details from the account altogether and setting them up again from scratch may be the solution and I shall try that in due course. The impediment that I have with this at the moment is that my ISP admits that it has 'a technical problem with its email servers' and some of its related web pages that prevent my doing this myself. I will have to go through the telephone 'help' line and ask the technician to set it up at their end on my instructions. This has some disadvantages in that I have to divulge the password to the account to the operator rather than keeping it anonymous by doing it on-line. You may have solved the problem, but until I can successfully sort out a working mailbox for my wife i cannot definitively say so.
Many thanks for your perseverance. You've made more sense than anyone else so far and that deserves some points, surely?

So, about a week ago my macbook pro started having lots of issues: wifi connectivity, slow performance, sound issues, spotlight wasn't working. After going through the issues with apple support, they decided the best course of action was to erase it...

So, about a week ago my macbook pro started having lots of issues: wifi connectivity, slow performance, sound issues, spotlight wasn't working. After going through the issues with apple support, they decided the best course of action was to erase the hard drive and do a reinstall. Since I have a recent backup this seemed like a good enough option. They were kind enough to send me a copy of the snow leopard disk to do the install since we couldn't get it to complete through the disk utility. Not sure why, since it says we are fully connected, it just never completed.
Anyway, so now that you have the background here is the new issue. The macbook pro keeps spitting out the disk I'm trying to install from. Disk utility and using the 'Startup Disk' function from the apple menu doesn't read the disk.
Can anyone suggest a solution to this vexing problem?
Thanks in advance.

Jeremy.Laurin,
have you tried agb76’s approach here?

HT3275 Time Machine Error: The backup disk image "Volumes/Data/My Macbook Pro.sparsebundle" is already in use. (How do I correct this issue?)

Time Machine did not back up:
Time Machine Error; ("The backup disk image "/Volumes/Data/My MacBook Pro.sparsebundle" is already in use.")
How do I correct this issue?
Thanks!

You need to be careful Bob.. people might take this literally.
Bob Timmons wrote:
How do I correct this issue?
Call the exterminator to get rid of the bugs in Lion and Mountain Lion.
https://discussions.apple.com/thread/5222487?tstart=0

Trying to connect my iPad Air 1 to my iPhone 5S set as a hotspot via WiFi method. iPad sees the iPhone as wifi hotspot, but an error appears 'Remote Hotspot Failure .. Unable to start personal hotspot'. How do I fix this issue??

Trying to connect my iPad Air 1 to my iPhone 5S set as a hotspot via WiFi method. iPad sees the iPhone as wifi hotspot, but an error appears 'Remote Hotspot Failure .. Unable to start personal hotspot'. How do I fix this issue??

iOS: Troubleshooting Personal Hotspot - Apple Support

Fails to start the sync session, how do I fix this issue?

I currently own an 8GB iPod Touch, everytime I try to sync it I get a "The iPod could not be synced because the sync session failed to start." How do I fix this issue?

See:
Sync Session Failed to Start iTouch iOS5: Apple Support Communities
iphone could not be synced sync session failed to start...: Apple Support Communities

After a power outage my usb ports on the back of the tower do not recognise the apple usb keyboard upon start up. How do I fix this issue?

I have a Mac Pro 5.1 and after a power outage my usb ports on the back of the tower do not recognise the apple usb keyboard upon start up. If I leave the plug out and then insert the keyboard after start up it works fine. The same happens with the front usb ports. How do I fix this issue?

System.log says USB related message?
Resetting SMC as well as NVRAM could solve the problem.
Intel-based Macs: Resetting the System Management Controller (SMC)
About NVRAM and PRAM

I have macbook pro and am on OS X Yosemite 10.10.2 . I am having lot of warning message on my browser that my computer is infected with malware/spyware and use mackeeper. How do I solve this issue . This is happening more on chrome and Safari browser

I have macbook pro and am on OS X Yosemite 10.10.2 . I am having lot of warning message on my browser that my computer is infected with malware/spyware and use mackeeper. How do I solve this issue . This is happening more on chrome and Safari browser

There is no need to download anything to solve this problem. You may have installed a variant of the "VSearch" ad-injection malware. Follow Apple Support's instructions to remove it.
If you have trouble following those instructions, see below.
Malware is always changing to get around the defenses against it. This procedure works as of now, as far as I know. It may not work in the future. Anyone finding this comment a few days or more after it was posted should look for a more recent discussion, or start a new one.
The VSearch malware tries to hide itself by varying the names of the files it installs. To remove it, you must first identify the naming pattern.
Triple-click the line below on this page to select it, then copy the text to the Clipboard by pressing the key combination command-C:
/Library/LaunchDaemons
In the Finder, select
          Go ▹ Go to Folder...
from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.
A folder named "LaunchDaemons" may open. Look inside it for two files with names of the form
          com.something.daemon.plist
and
           com.something.helper.plist
Here something is a variable string of characters, which can be different in each case. So far it has always been a string of letters without punctuation, such as "cloud," "dot," "highway," "submarine," or "trusteddownloads." Sometimes it's a meaningless string such as "e8dec5ae7fc75c28" rather than a word. Sometimes the string is "apple," and then you must be especially careful not to delete the wrong files, because many built-in OS X files have similar names.
If you find these files, leave the LaunchDaemons folder open, and open the following folder in the same way:
/Library/LaunchAgents
In this folder, there may be a file named
          com.something.agent.plist
where the string something is the same as before.
If you feel confident that you've identified the above files, back up all data, then drag just those three files—nothing else—to the Trash. You may be prompted for your administrator login password. Close the Finder windows and restart the computer.
Don't delete the "LaunchAgents" or "LaunchDaemons" folder or anything else inside either one.
The malware is now permanently inactivated, as long as you never reinstall it. You can stop here if you like, or you can remove two remaining components for the sake of completeness.
Open this folder:
/Library/Application Support
If it has a subfolder named just
           something
where something is the same string you saw before, drag that subfolder to the Trash and close the window.
Don't delete the "Application Support" folder or anything else inside it.
Finally, in this folder:
/System/Library/Frameworks
there may an item named exactly
            v.framework
It's actually a folder, though it has a different icon than usual. This item always has the above name; it doesn't vary. Drag it to the Trash and close the window.
Don't delete the "Frameworks" folder or anything else inside it.
If you didn't find the files or you're not sure about the identification, post what you found.
If in doubt, or if you have no backups, change nothing at all.
The trouble may have started when you downloaded and ran an application called "MPlayerX." That's the name of a legitimate free movie player, but the name is also used fraudulently to distribute VSearch. If there is an item with that name in the Applications folder, delete it, and if you wish, replace it with the genuine article from mplayerx.org.
This trojan is often found on illegal websites that traffic in pirated content such as movies. If you, or anyone else who uses the computer, visit such sites and follow prompts to install software, you can expect more of the same, and worse, to follow. Never install any software that you downloaded from a bittorrent, or that was downloaded by someone else from an unknown source.
In the Security & Privacy pane of System Preferences, select the General tab. The radio button marked Anywhere should not be selected. If it is, click the lock icon to unlock the settings, then select one of the other buttons. After that, don't ignore a warning that you are about to run or install an application from an unknown developer.
Then, still in System Preferences, open the App Store or Software Update pane and check the box marked
          Install system data files and security updates (OS X 10.10 or later)
or
          Download updates automatically (OS X 10.9 or earlier)
if it's not already checked.

HT1689 I purchased a song on my iPhone from iTunes & the song won't fully download how do I fix this issue

I purchased a song on iTunes which will not fully download but n my music files its there but no sound
HOw do I fix this issue?

This Apple article has some good info -> iTunes: How to resume interrupted iTunes Store downloads
Resuming downloads from an iOS device
From the Home screen, tap the iTunes icon.
For iPhone/iPod touch, tap More > Downloads. For iPad, tap Downloads.
Enter your account name and password.
Click the "OK" button.
Click the Resume, Resume All, or button to start the download.
If you cannot complete the download on your device, you can finish the download in iTunes on your computer and then sync it to your device. For instructions, see the following articles:
iTunes Store: Where can I download and sync my purchases?
iTunes Store: Transferring purchases from your iPhone, iPad, or iPod to a computer

HT201210 I m having problems with both my iphone 3gs and 4 when my cellular data is on and my battery is fully charge but out of suddenn it will shut off can i know how can i troubleshoot this issue thanks

I m having problems with both my iphone 3gs and 4 when my cellular data is on and my battery is fully charge but out of suddenn it will shut off can i know how can i troubleshoot this issue thanks

simply try doing a back up and restore
when going thru the activation screen, select SET UP AS NEW and then test your device. if it is not shutting down then it could be 1 or more apps tht have been downloaded wch could be affecting the device
you will then need to follow the process of eleimnation, meaning add 2 apps and then monitor your phone, if nothing happes then add another couple of them and then check
good luck !!

I have an IPOD Classic with purchased music and i want to sync it with my itunes account but I keep getting the message your device is synced with another PC. How do I resolve this issue?

I have an IPOD Classic with purchased music and I want to sync it with a different PC but I get the message your device is synced with another PC. How do I resolve this issue? I don't have the previous PC.

I want to sync it with a different PC
On that PC, launch iTunes. From the menu bar top of your screen click Store / Authorize This Computer.

My Macbook recently started having the screen go dark while I am using it. I can see that the sleep light is still on but I can no longer see anything on the screen. How do I troubleshoot this issue?

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