A key on keyboard won't work when cold

When my MacBook Pro is cold, the "a" key won't respond. After the computer warms up, I have no further problems. Any suggestions?

Just how cold? Your MBP has the following temperature guidelines:
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: –13° to 113° F (–24° to 45° C)
Are you operating in an enviornment below 50ºF/10ºC?
Clinton

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My 8 key won't work when I press it to put in my password, what can I do?

my 8 key won't work when I press it to put in my password, what can I do?

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My wireless keyboard won't work for one of the users

All of a sudden the wireless keyboard stopped working for me, but it works when my wife logs in. I had to create a new account for myself and the keyboard now works. However, the keyboard won't work for my original account. Any thoughts?

Does it shows up as a device in your BT menu under the problematic user? Does it connect? If you delete it from your admin account and re-pair it, does it work?
There is a command called ioreg, which can help as well.
Here is sample output from ioreg -lw0 | grep -i keyboard
      |   | +-o AppleBluetoothHIDKeyboard <class AppleBluetoothHIDKeyboard, id 0x10000372d, registered, matched, active, busy 0 (4 ms), retain 10>
      |   |   |   "Product" = "BT-Keyboard-AL-i71"
      |   |   |   "PoweredOffNotificationType" = "KeyboardOff"
      |   |   |   "CFBundleIdentifier" = "com.apple.driver.AppleBluetoothHIDKeyboard"
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      |   |   | +-o AppleEmbeddedKeyboard <class AppleEmbeddedKeyboard, id 0x100003734, registered, matched, active, busy 0 (0 ms), retain 10>
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      |   |   |   |   "Product" = "BT-Keyboard-AL-i71"
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      |   |   |   |   "NumLockKeyboardUsageMap" = "0x00070029,0x00070029,0x0007002a,0x0007002a,0x0007002b,0x0007002b,0x0007003a,0 x0007003a,0x0007003b,0x0007003b,0x0007003c,0x0007003c,0x0007003d,0x0007003d,0x00 07003e,0x0007003e,0x0007003f,0x0007003f,0x00070040,0x00070040,0x00070041,0x00070 041,0x00070042,0x00070042,0x00070043,0x00070043,0x00070044,0x00070044,0x00070045 ,0x00070045,0x0007004a,0x0007004a,0x0007004b,0x0007004b,0x0007004c,0x0007004c,0x 0007004d,0x0007004d,0x0007004e,0x0007004e,0x0007004f,0x0007004f,0x00070050,0x000 70050,0x00070051,0x00070051,0x00070052,0x00070052,0x0007000d,0x00070059,0x000700 0e,0x0007005a,0x0007000f,0x0007005b,0x00070018,0x0007005c,0x0007000c,0x0007005d, 0x00070012,0x0007005e,0x00070024,0x0007005f,0x00070025,0x00070060,0x00070026,0x0 0070061,0x00070010,0x00070062,0x00070037,0x00070063,0x00070082,0x00070082,0x0007 00e0,0x000700e0,0x000700e1,0x000700e1,0x000700e2,0x000700e2,0x000700e3,0x000700e 3,0x000700e4,0x000700e4,0x000700e5,0x000700e5,0x000700e6,0x000700e6,0x000700e7,0 x000700e7"
      |   |   |   |   "CFBundleIdentifier" = "com.apple.driver.AppleHIDKeyboard"
      |   |   |   |   "HIDEventServiceProperties" = {"HIDKeyboardModifierMappingPairs"=()}
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      |   |   |   | |   "HIDKeyboardRightModifierSupport" = Yes
      |   |   |   | |   "HIDKeyboardKeysDefined" = Yes
      |   |   |   | |   "Product" = "BT-Keyboard-AL-i71"
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      |   |   |   | |   "HIDParameters" = {"HIDKeyboardModifierMappingPairs"=()}
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Some keys on keyboard are not working

Laptop: HP DM4 2070us
just recently, some of my keys are not responding or working when i press on them. I have not spilled or dropped my laptop but suddenly, my backspace, various numbers, and various f1 to f12 will not respond when i try to use them. it is very troublesome not being able to use my backspace bar and it is bugging me! i tried scanning my laptop for viruses but nothing was found. Im not sure if it could be a circuit problem or something but i need to fix it asap because i need my laptop for class. Please help me if anyone knows what may be the problem!!
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Hi
You have a couple of options as I see it please try these steps given below might help you to fix your issue.
1) Go to Device Manager and uninstall the click on + symbol next to Keyboard then uninstall the standard keyboard then restart your unit and check.
2) Go to HP website and update the Bios on the unit.
3) Click start type Command Prompt check if all the numbers & alphabets works fine in this screen if not you might have to replace the keyboard.
If your notebook is still under warranty, contact HP and arrange to have the part replaced.
If you are out of warranty and would like a guide on replacing the part yourself, please let me know.
Let us know how it goes!
*Although I am an HP employee, I am speaking for myself and not for HP.
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****Please mark Accept As Solution if it solves your problem****
Regards
Manjunath
Let us know how it goes!
"I work for HP."
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Regards
Manjunath

Since I updated to Yosemite my mouse won't work when I turn on, unless I unplug it and put it in again

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Laptop is a few weeks old and I've only just got around to registering it. I couldn't register it until it had an update.
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I can use keys to increase/decrease brightness of the screen, but nothing else.
I've already tried holding down the power button for 10 seconds, it's just made loading times worse.
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hi VeeBee15,
Welcome to the Forums.
If you ran Windows Update and you get the issues on the keyboard can, you try to:
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2. Boot into Safe Mode and see if the keyboard works. If the keyboard doesn't work, perform a System Restore in Safe Mode.
3. If System Restore doesn't work, perform a full factory restore by pressing the OneKey Recovery button.
Hope this helps
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Few keys in Keyboard is not working.

Few days back my laptop( HP Pavilion G6) screen got froze(Laptop starting but no display, caps key blinking 3 times) so i checked on internet and come to know its may be because of error in memory module. So i put my RAM in other slot. Now my laptop started but a new issue occured.
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Hi
Please find the steps given below might help you to fix your issue.
Go to device manager & uninstall the keyboard driver and restart the unit.
Please update the driver for Bios.
Try doing a system restore to the date where unit was working fine.
Open command prompt type the letter and check if does not work you might have to replace the keyboard itself.
Let us know how it goes!
"I work for HP."
****Click the (purple thumbs up icon in the lower right corner of a post) to say thanks****
****Please mark Accept As Solution if it solves your problem****
Regards
Manjunath

I have an ipod 2g , The keyboard won't work! Or at least some of it's letters and numbers won't. please help i'm stuck with emojis

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Hello @harmankakkar ,
Welcome to the HP Forums!
I understand your notebook has taken on some damage to the chassis and keyboard.
You can find a full list of parts for the product, and the steps to replace them yourself in the Maintenance and Service guide available in the User Guide section on your products support page here: HP - Drivers & Downloads.
You will need your exact product or model number to access this information. For information on finding your product and model numbers click here: How Do I Find My Model Number or Product Number?
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Please click "Accept as Solution" if you feel my post solved your issue, it will help others find the solution.
The Great Deku Tree
I work on behalf of HP.

A key on keyboard won't work when cold

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