Go Back   Tech Support Forum > Alternative Computing > Mac Support

User Tag List

Strange Keyboard keys behaviour

This is a discussion on Strange Keyboard keys behaviour within the Mac Support forums, part of the Tech Support Forum category. Dear All, I have a MacBook Pro 13" MID 2012 (MacBookPro 9,2) running on 10.9.5 with 4 Gig of RAM.

Closed Thread
Thread Tools Search this Thread
Old 07-10-2016, 03:22 AM   #1
Registered Member
Join Date: Jul 2016
Posts: 1
OS: OSX 10.9.5

Dear All,

I have a MacBook Pro 13" MID 2012 (MacBookPro 9,2) running on 10.9.5 with 4 Gig of RAM.

Recently the integrated mouse pad started to go crazy, possibly although not sure because of liquid. In the process it fried the Hard drive for some reason.

So I opened it, cleaned the mouse pad in alcohol, put it back changed the HDD and it started working fine again. Unfortunately in the process the PAD go hit and cracked in the corner. It still worked, but didn't look nice. So, bought a new track pad and replaced it. It works perfectly fine. So all good on that side.

But... something strange then happened, even before I replaced the pad. The keys F11, F12, Disk eject and backspace stopped working... All the other keys work perfectly. When I changed the track pad, they still didn't work, but after 5 minutes or so they suddenly worked again. I turned the computer off and when I turned it back on, they were not working anymore and never came back to life since. When I use the Keyboard viewer, they do not react either.

Now here comes the very very strange bit. If I combine them, that is if I press them all at the same time, they do react... backspace+eject+F12 gives me the apostrophe and shows on the Keyborad viewer as such. eject+F12+F11 gives me the inverted commas and again shows as such on the Keyboard viewer. eject+F12+F11+eject gives me both the inverted commas and the apostrophe and again shows as such on the Keyboard viewer. If I try these combinations on a computer that doesn't have that problem, these combinations give nothing...

Any other combination of these keys do not give anything. Also to test if each key was actually recognised, I pressed both combination varying which was the last key pressed, and they all seem to be picked up, which seems to indicate that they all work.

I did a fresh install of Mavericks, nothing. I cleared the VRam, nothing.

I tried to disconnect the mouse pad altogether and start the computer, and then to my surprise the whole keyboard is not recognised anymore, indicating that somehow keyboard and trackpad are related. When I connected it again, the keyboard worked but those 4 keys still not.

Any ideas as to what I could do? I can live without the F and eject keys, but not having the backspace is really a pain.

Thank you all !
Galaktos is offline  
Sponsored Links
Old 07-10-2016, 05:43 AM   #2
TSF Team, Emeritus
spunk.funk's Avatar
Join Date: May 2010
Location: Los Angeles
Posts: 40,527
OS: Windows 10 64 bit

My System

possibly although not sure because of liquid.
use the onscreen keyboard Type on Your Screen with the Mac Mavericks Virtual Keyboard - For Dummies see if the same behavior happens.
If liquid was spilled on the keyboard, it would act erratically, Replace the keyboard
Please press the Like link to right of any post you found helpful.
spunk.funk is online now  
Closed Thread

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Certain keys do not work on a keyboard
Hello. I noticed that I have to press my c key really hard to actually get letter c. At first i thought that the connector or whatever you call it is not working properly but then I also noticed that my 1, 2, 3, / and - (all on numeric keypad) keys aren't working as well. But then the...
Shredmaster Laptop Support 8 03-20-2014 11:39 PM
Keyboard keys all messed up...HELP?
Ok if i dont get help i swear to you my asian mother will kill me and whats worse is that my dad likes to make people feel guilty for what they did so he said she'll have my head =.= SHE WILL.Anyways so i was just eating and i may have spilled some...ramen juice on the touch pad and some of the...
bgc162 Other Hardware Support 2 09-03-2013 10:17 AM
mac keyboard function keys on windows?
hey guys i just got a mac aluminum keyboard from goodwill for 20 bucks (i know win) but the keyboard works fine but i was wondering is there a way to make the function keys work like they do on a mac in windows 7? like there is function volume up/down and brightness up/down and like the dashboard...
Chyrio Windows 7 , Windows Vista Support 4 11-11-2011 11:42 PM
Laptop Keyboard are oily? Becomes too hot to touch it on the oily keys.
My laptop is about 2 years old (Sony VAIO). Some of the keys are kinda oily or something cuz I see black stuffs on them. Other keys don't have it, only some of them do. The laptop is on about 10+ hours daily. My fingers kinda burns or is too hot to touch it when you put it on those keys. You can...
ninjamonke Laptop Support 1 11-09-2011 11:49 AM
[SOLVED] Keyboard keys mixed up
My (2nd hand) Toshiba Satellite A300D demonstrates the weirdest problem with the keyboard. It seems to have mixed up all the punctuation marks and symbol keys like dash, hyphen, underscore, double point, @, questionmark and many others. Only . and , are OK. So if I want to type a @, I have to...
Rule Laptop Support 3 02-28-2011 12:31 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is on
Smilies are on
[IMG] code is on
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Post a Question

» Site Navigation
 > FAQ
Powered by vBadvanced CMPS v3.2.3

All times are GMT -7. The time now is 01:56 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright 2001 - 2018, Tech Support Forum

Windows 10 - Windows 7 - Windows XP - Windows Vista - Trojan Removal - Spyware Removal - Virus Removal - Networking - Security - Top Web Hosts