Macbook arrow keys not working - Air Apple Computers & Internet

You may have something stuck under the key. You can try lifting the key a little or even taking it off and cleaning under it.

Where are your up and town arrows? I don't see any on my Mac air. There are right and left arrows when in a browser.

Boot to the Recovery HD:

Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.

When the menubar appears select Terminal from the Utilities menu. Enter resetpassword at the prompt and press RETURN. Follow instructions in the dialog window that will appear.

When you start up your computer, hold down the option key. This will bring up the bootable devices menu. Depending on wether or not you have an Operating System installed, you should see either 1 or more icons. Click on the one with the CD icon that should be labeled "Snow Leopard". Once you have clicked on the icon, click the arrow beneath it and your Mac will boot off the OS CD.

When you first turn the machine on, hold down the "Option" key. Then select Macintosh HD and click the arrow below. If this doesn't work then try another key combination: Option, Command, P, R. Hold this down until the machine restarts itself. This will reset your machine's PRAM which can help.

The first thing to try is this: It is a keyboard shortcut to shut down a mac laptop. Press the control key (ctrl) at the bottom and press the eject button at the same time (top button all the way to the right which looks like an arrow pointing up with a line under it). This should bring up a window asking if you want to restart, sleep,cancel or shut down. Click Yes to shutdown! If this does not work, here is the second option. Press the power button down on the upper right side,and just hold it down until the computor turns off. I have done this many times with my own computor when it has crashed with no ill effects, I have heard from Apple that it is not good for your computor and can cause problems, so I would only do this if the keyboard short cut does not work Good luck and if you find this helpful please comment!.

First off, you need to determine whether the keys themselves are faulty, or whether you just have your system set up to ignore them.
Go to Apple Menu / System Preferences / Language & Text (this is on Snow Leopard, on Leopard I believe you have to look under International). Turn on "Keyboard and Character Viewer" and "Show input menu in menu bar." Now on the Menu bar, you will see an icon of a box with an asterisk in it. Choose "Show keyboard viewer." Now type the arrow keys and see if they blink on the keyboard viewer. If they do, there is nothing wrong with your keyboard; you just have somehow set those keys to have no effect (and figuring that out is another issue). If they do not blink, you have a hardware problem in your keyboard that will require keyboard replacement.
Services like laptopkey.com will NOT help you, as they sell only key CAPS, and the problem is in your key electronics.
A MacBook Pro keyboard is NOT a user-replaceable part.

google it...

have you tried booting off system disk? Older os 10.4 disks won't work with intel macs.

Check the Speech settings in System Preferences. Your delete key may have been selected as a Listening Key. Disable Speakable Items. See if that helps.