All of a sudden my keyboard won't type.

All of a sudden my keyboard won't type. This happened before and it was just something that I hit accidentally that turned off the keyboard. Can't remember how to fix it. It was very simple, like pressing a couple keys and it worked.

As I suspected, the keys aren't registering to allow you to boot from a CD or switch the startup disk. I am going to assume that you wont be able to reset the pram or do an SMC reset either. You can try anyway...
PRAM reset
hold Option + Command + P + R and press the power button. Hold those keys until you hear the startup chime at least 2 times.
SMC Reset
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Safe boot
Hold the shift key whilst rebooting.
You can try these three things, but I'm leaning towards a hardware failure on this as it seems the KB is not functioning even prior to the OS loading.

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I got windows 7 and I downloaded itunes and at first it said it was incompatible but then i got it to work. Now all of a sudden my itunes won't open. It keeps saying it is incompatible. Again??

I got windows 7 and I downloaded itunes and at first it said it was incompatible but then i got it to work. Now all of a sudden my itunes won't open. It keeps saying it is incompatible. Again??

Try the following document, only be sure that none of the boxes in the compatibility mode tab are checked (not just the compatibility mode box itself):
iTunes for Windows: How to turn off Compatibility Mode

I have a macbook air and and hdmi that i have used many times, but not all of a sudden the tv won't recognize the hdmi. The computer flashes when it is plugged into the hdmi but the tv says "no signal" and the airplay displays option says "no device"

I have a macbook air and and hdmi that i have used many times, but not all of a sudden the tv won't recognize the hdmi. The computer flashes when it is plugged into the hdmi but the tv says "no signal" and the airplay displays option says "no device detected" and the drop down bar is grey and locked.

I have a macbook air and and hdmi that i have used many times, but not all of a sudden the tv won't recognize the hdmi. The computer flashes when it is plugged into the hdmi but the tv says "no signal" and the airplay displays option says "no device detected" and the drop down bar is grey and locked.

My epson stylus SX235W has all of a sudden decided it won't print from my mac. it says rastertoescpII has unexpectedly quit. what is this and how do i get it to print from my mac again?

my epson stylus SX235W has all of a sudden decided it won't print from my mac. it says rastertoescpII has unexpectedly quit. what is this and how do i get it to print from my mac again?

Open the Sharing pane in System Preferences. If the Computer Name is not set, enter a name. You may first have to click the lock icon in the lower left corner and authenticate to unlock the settings.
Credit for this solution to ASC user Yuengdog1983.

My MacBook Pro is password protected but all of a sudden the keyboard stopped functioning and I can't log in at all. What should I do? Thanks in advance.

My MacBook Pro is password protected but all of a sudden the keyboard stopped functioning and I can't log in at all. What should I do? Thanks in advance.

Get a USB key board

All of a sudden, my iPad won't come on. I can't tell if it is charging. Did the screen die? I had no problems prior to this.

All of a sudden, my iPad won't turn on. I've had no previous problems. I plugged it in last night, at 9%. Took it to work this morning. It worked for a while. Then, I went to check email again, and it wouldn't come on. I hadn't noticed the power status, so I don't know if it didn't take a charge overnight. It's been plugged in again all evening, and still won't turn on. Any suggestions?

It's possible you have a defective charger and you don't have any juice left. The first thing you should try is a reboot: Press and hold BOTH the power and home buttons at the SAME time for at least 10 seconds (ignore the red slider to shut down) until the Apple Logo appears, then let go o both buttons and hopefully, your iPad will restart. If that doesn't work, it's possible you just don't have a charge left. You can trickle charge your iPad via your computer, it will take a loooong time, but even though it says it's not charging, it is, just verrrry slowly. If that doesn't work, it's probably time to make an appointment at the Genius Bar at your Apple Store. If of course your wall charger isn't charging your device, it could be as simple as replacing the charger.

All of a sudden, my iTunes won't play music.

All of a sudden my iTunes won't play anything in the store or my library. Updates are done and my windows computer is authorized. It has worked fine in the past and then all of a sudden, I click play and nothing plays. I can play music and video in other programs except itunes. Volume is up also. It won't play at all. Any suggestions???

I would suggest first,
looking for the files (not in iTunes but on the desktop. If you find the files they've simply been removed from iTunes. - If you can't find the files they've been erased and there's not a lot that can be done.
Removing files from and iPod is another question. Firstly, it IS difficult, but it can be done. There are numerous tutorials on the web on how to do it.
Regards,
Peter.

HT201320 All of a sudden my IPad won't let me read my emails, says wrong password, but I haven't changed anything! I've switched Ipad off and on againmbut it doesn't help. Can anyone please tell me what I should do??

All of a sudden my ipad2 won't let me read emails, says wrong password but I haven't changed anything!! Can anyone please help me to sort this? Many thanks.

iOS: Unable to send or receive email
http://support.apple.com/kb/TS3899
Can’t Send Emails on iPad – Troubleshooting Steps
http://ipadhelp.com/ipad-help/ipad-cant-send-emails-troubleshooting-steps/
Setting up and troubleshooting Mail
http://www.apple.com/support/ipad/assistant/mail/
Using a POP account with multiple devices
http://support.apple.com/kb/ht3228
iOS: Adding an email account
http://support.apple.com/kb/HT4810
iOS: Setting up an Outlook.com, Hotmail, Live, or MSN email account
http://support.apple.com/kb/ht1694
Server does not allow relaying email error, fix
http://appletoolbox.com/2012/01/server-does-not-allow-relaying-email-error-fix/
Why Does My iPad Say "Cannot Connect to Server"?
http://www.ehow.co.uk/info_8693415_ipad-say-cannot-connect-server.html
How to Sync Contacts with Your iPad Using iTunes
http://www.dummies.com/how-to/content/how-to-sync-contacts-with-your-ipad-using- itunes.html
iOS: 'Mailbox Locked', account is in use on another device, or prompt to re-enter POP3 password
http://support.apple.com/kb/ts2621
The iPad's Mail app has no provisions for creating groups. However, you can use a third party app that many users recommend.
MailShot - https://itunes.apple.com/us/app/mailshot-pro-group-email-done/id445996226?mt=8
Group Email - https://itunes.apple.com/us/app/group-email!-mail-client-attachments/id380690305 ?mt=8
iPad Mail
http://www.apple.com/support/ipad/mail/
Configuration problems with IMAP e-mail on iOS with a non-standard SSL port.
http://colinrobbins.me/2013/02/09/configuration-problems-with-imap-e-mail-on-ios -with-a-non-standard-ssl-port/
Try this first - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.)
Or this - Delete the account in Mail and then set it up again. Settings->Mail, Contacts, Calendars -> Accounts Tap on the Account, then on the red button that says Remove Account.
 Cheers, Tom

All of the sudden my keyboard is not working. the trackpad is working, but i can't enter any letters/numbers?

all of the sudden my keyboard is not working. the trackpad is working, but i can't enter any letters/numbers?

Try:
- Reset the iOS device. Nothing will be lost
Reset iOS device: Hold down the On/Off button and the Home button at the same time for at
least ten seconds, until the Apple logo appears.
- Restore from backup. See:
iOS: How to back up
- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem. Likey a bad digitizer
Apple Retail Store - Genius Bar

My ipod5 turned off all of a sudden and then won't turn on and off anymore, nothing works. what can I do?

I just got my Ipod5 a month ago and everthing was going well, until yesterday when all I did was lock my ipod and then all of a sudden it turned off and now nothing works. It won't turn on or off, it won't charge, and it won't connect to the PC. What happened? help.

Try:
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try another cable
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar

So my iPhone 4S started draining battery after recent update, battery got changed and it worked perfect for 3 days, all of a sudden the phone won't stay on unless connected to mains... Cannot receive any signal "searching" constantly. HELP

So my iPhone 4S started draining battery after recent update, battery got changed and it worked perfect for 3 days, all of a sudden the phone shut down and now won't stay on unless connected to mains... Claims its at 100% battery but thats impossible as it was at 30% before it shut down randomly.
Cannot receive any signal "searching" constantly.
Turns off as soon as removed from usb ... wont stay on connected to laptop!
HELP!

The iPhone includes a one year warranty. If an Apple store is not nearby, you can call AppleCare and handle an exchange under warranty over the phone. The exchange will be shipped to your door - someone must sign for the delivery so if no one will be at home, have it delivered where you work. You use the same box to return the existing iPhone back to Apple. Return shipping label and tape to reveal the box incuded - call the carrier with number incuded when the box is ready to be picked up. AppleCare will request a credit card in the event the existing iPhone is not returned within 10 days after the exchange under warranty is received.
Hardware can fail - it happens, which is why there is a one year warranty.

All of a sudden, my iphone won't sync calendar and contacts...says unsupported.

All of a sudden my iphone 4 won't sync calendars and contacts. It says unsupported apps. Any ideas on the problem or troubleshooting?

Sync from where? iOS version?

Why all of a sudden my Iphone won't download photos!

I use my iphone for my work and take many photos. All of a sudden I can't download them. Iphoto doesn't even rcognize my iphone is pluged in! Anyone else have this issue?

There are 9 different versions of iPhoto and they run on seven different versions of the Operating System. The tricks and tips for dealing with issues vary from version to version and OS to OS. So before anyone can help, they need information to work with. Basic stuff:
- What version of iPhoto.
- What version of the Operating System.
- Details. What were you doing when the problem arose?
- Did it ever work properly?
- Are there error messages?
- What steps have you tried already to solve the issue.
Anything else you can think of that might allow someone else to understand your issue.
With this kind of information somebody can develop a starting point for troubleshooting the issue.

HT1296 All of a sudden my computer won't recognize my iphone, it will still charge it but it no longer opens itunes when i plug it in my computer nor does it recognize a useable device for itunes.... can someone please help!?

My computer refuses to recognize my iphone all of a sudden and i cant sync it anymore, Can anyone give me any advice??

Troubleshooting depends on what computer OS you are using.
Since you do not indicate what you use, here are both.
Windows: http://support.apple.com/kb/TS1538
OS X: http://support.apple.com/kb/TS1591

HELP, All of a sudden, my iPhone won't connect to iTunes although it shows up on the PC. What happened?

Up to a few days ago my iphone would auto open my itunes. All of a sudden, although the phone showes up as a device it does not connect to itunes anymore. No changes made to the PC as far as I know. HELP!

Try holding down CTRL as you launch iTunes to see if it will repair the drivers.
Or try Cerbu's post here.
Or see TS1538: iOS: Device not recognized in iTunes for Windows, in particular section 5, forcing a driver update.
tt2

All of a sudden my keyboard won't type.

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