Wired keyboard up arrow not working in finder

My keyboard has all of a sudden decided to, for lack of a better word, spaz out!
I have a 2011/2012 21.5 inch iMac (intel), with a wired keyboard (with numerical pad) and mouse. When I'm on the desktop (finder) and i select a folder, the up button on the keyboard moves 'down' (one folder) and then won't move again. The down button and sideways buttons work fine, and it appears all the other keys do to. When I go into a program like safari the up arrow works fine, I can scroll pages up and down without a problem.
The issue first began when i was working in indesign, and I went to the text palette and tried to manually tap up the point size, but instead it opened the swatches palette, and I couldn't understand why the up key wasn't working. I quit indesign and as this was happening I was doing something in the finder and noticed the problem there too.
I shut down all the program's and restarted. This didn't work, so I came exploring on apple discussions. I rebooted the computer in safe mode but that didn't work either. I searched in library > preferences for a com.apple.finder.plist (as I saw this mentioned in some discussions) but there was no such file living in the preferences.
I'm really not sure what to do to rectify this.. If anyone could help that would be super awesome! Thanks in advance!
Penny

Also, I forgot to add, that in iTunes and spotify the up button works, but as it does it makes that error-y sound as if it is not working (even though it is)

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Apple wired keyboard - certain keys not working with shift

I treated myself to a new Apple wired keyboard MB110B/A for my mac mini.
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Once the computer has started, if I plug the new keyboard in, it appears to work normally with the following exceptions. The following keys do not register when the "shift" key is pressed: 2, w, s, x. This fault does not occur with my old keyboard.
As these keys are in a line, I think there may be a wiring fault inside the keyboard. If so, would this explain the computer entering Hardware Test mode every time it is started with the keyboard connected?
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Definitely sounds like a hardware fault in the keyboard to me. I assume it's the same whichever USB port it's connected to? (and if you plug it into another Mac, too)?
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If it's a reproducible fault (and new anyway): take/send it back for replacement. You shouldn't have any trouble with Apple arguing.

Wired Keyboard Certain Keys not Working?

The keys 3 e d do not work.
It however does work in Bootcamp.
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Definitely sounds like a hardware fault in the keyboard to me. I assume it's the same whichever USB port it's connected to? (and if you plug it into another Mac, too)?
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If it's a reproducible fault (and new anyway): take/send it back for replacement. You shouldn't have any trouble with Apple arguing.

Wired Keyboard some keys not working

Hi there,
have been using an external wired apple keyboard on macbook pro retina for 6 month.
Apple Keyboard with Numeric Keypad - English (USA)
Suddenly 3 keys just stopped working:
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bungalow

Hello bungalow2014
Check out the article below for further troubleshooting options for your keyboard. One other thing to check is to open Keyboard Viewer to see if there is anything else being pressed while hitting those keys.
One or more keys on the keyboard do not respond
http://support.apple.com/kb/ts1381
Regards,
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I think Spark cured this for another person and the same problem...
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Brand new 15" MacBook Pro Retina - unplugged from Thunderbolt Display and Keyboards today find keyboard alpha-numerics not working; except the function keys, delete key, tab key, command/ctrl/shift/alt/fn and arrow keys; and 7/8/9/u/o/j/l nudge cursor

Brand new 15" MacBook Pro Retina - unplugged from Thunderbolt Display and Keyboards today find keyboard alpha-numerics not working; except the function keys, delete key, tab key, command/ctrl/shift/alt/fn and arrow keys; and 7/8/9/u/o/j/l produce cursor nudges.

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Some keys not working. Need help/suggestions. Not great with computers so PLEASE give details/steps re: how to do what you suggest - thanks!
Details: intel based iMac running snow leopard 10.6.8. Apple wireless/bluetooth keyboard (came with the iMac).
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The problem happens in various programs (safari, pages, etc)
The keyboard is fine on another iMac
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yes - not sure how this works...if you can see my original post there are a lot of details in there. If you can't...
nutshell: the keyboard works on a different iMac
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             I also removed the keyboard from the computer (using the +/- symbols and disconnecting and then repairing it. The problem remained
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This question was solved.
View Solution.

Thanks for the information, that is exactly what I needed.
If you are having the enter issue when using the wired KB from your old computer that sounds software related with the blog site.
What web browser do you use when on that website?
Connect your wireless equipment back and if you continue to have the issue with the letters repeating then you should inquire about a replacement for what is referred to as "sticky keys". With it being a new unit this shouldn't be an issue.
Let me know if you have other questions.
↙-----------How do I give Kudos?| How do I mark a post as Solved? ----------------↓

Wireless keyboard some keys not working

wireless keyboard some keys not working need help

Please do a SMC reset, if that does not work the first time please do it 2-3 more times. You can find instructions at:
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Hi
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Thoughts on a Soggy System:
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You can always send the system to HP and have it repaired. It is not free unless you have the warranty for it - but it is not horrible to do; HP makes the process pretty easy. It might be worth checking if you do not have a local option available!
Contact HP - USA
Good Luck!
Kind Regards,
Dragon-Fur

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Hi coffee12345,
Welcome to the HP Forums!
I have read your post on your wireless keyboard and mouse not working with your desktop, and I would be happy to help you! To begin, I need to ask you a few introductory questions:
What is the Product and Model Number of your desktop?
What version of Windows are you using?
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Are you using a USB hub to connect your peripherals or is it directly plugged into the computer?
Please re-post with the necessary information, and I look forward to your reply!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

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================
When posting in Apple Communties/Forums/Message Boards.......It would help us to know which iMac model you have, which OS & version you're using, how much RAM, etc. You can have this info displayed on the bottom of every post by completing your system profile and filling in the information asked for.
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Wired keyboard up arrow not working in finder

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