Lost my keyboard light on MBP 13" there yesterday ...gone today

up graded HD and Ram keyboard backlight went away and also in system settings

dasdadog wrote:
Thanks again for the reply;
The resets were all done before I posted the problem. The unit date and model has had this problem since it was launched by apple. I was trying to find out if anyone with this unit MBP mid 2010 has come up with a solution, I have researched and just reports but no fixes...
Well, if this is the case, you should have indicated this in your original post. Leaving out those details and wording it like you did lead me and others to belive that you upgraded the hd and ram and then started to have this problem, which doesn't seem to be the case according to your last post.

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In the Previous iTunes Libraries folder should be a number of dated iTunes Library files. Take the most recent of these and copy it into the iTunes folder. Rename iTunes Library.itl as iTunes Library (Corrupt).itl and then rename the restored file as iTunes Library.itl. Start iTunes. Should all be good, bar any recent additions to or deletions from your library.
See iTunes Folder Watch for a tool to catch up with any changes since the backup file was created.
When you get it all working make a backup!
Should you be in the unfortunate position where you are no longer able to access your original library, or a backup of it, then see Recover your iTunes library from your iPod or iOS device.
Would you mind telling me which anti-virus package you use? It may be that it is disturbing iTunes when it tries to write out the fresh database, as it does after almost any activity with your library. I'm noticing more of this type of problem than usual and trying to see if there is any pattern. It may help to prevent a repeat of the problem if you look at the advanced options for your AV package and see if you can find a way to exclude the iTunes folder from any real-time scanning process.
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My Macbook Pro has lost the keyboard lighting - only 18 months old

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Have you tryed a SMC reset.
http://support.apple.com/kb/HT3964
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I have tried to update a MBP from Snow Leopard to Moutain Lion. But after updating the keyboard lights stopped working. Its A MBP from mid 2010 Core2, 2,4Ghz
We have tried to reset the smc.
Tried to untick the automatic brightness contoll of the keyboard llumination in system preferences.
Tried to use F5/F6 and it just shows that the keyboard light is turned on but its completly dark.
Is it coming a an mac os x 10.8 update for this problem?

Sounds like they did an Archive & Install, which leaves you with non-functioning Pro Apps (and Adobe apps, if you have any).
Try removing Final Cut Pro and Compressor and reinstall.
Instructions for reinstalling Final Cut Pro: http://support.apple.com/kb/TS1846
Instructions for reinstalling Compressor: http://support.apple.com/kb/TS1888
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MBP 2010 had Mobo replaced - Now keyboard lights not working?!?!

Hi,
I have just picked my MBP 2010 back up from the apple store, after it having its main logic board replaced. After having it back home for a few hours, I have only just noticed that the keyboard back lights are no longer functioning. By turning the brightness up with the f6 key, it brings up the HUD which shows the brightness bar going up, but the lights are still off.
I have tried to go into the settings and turn off the option that says automatically illuminate keyboard in low light to see if that fixed the issue, but no success. I have also installed lab tick, but this still did not get the backlight functioning.
The last thing I tried was a SMC reset. I performed this twice but to no avail.
I have tried to search the forums for alternative reasons as to why they would not be working, but cant find anything.
Can anyone advise me as to what my next step should be? I would like to try to fix this myself rather than take it back to the apple store, as it is about an hours drive away (last resort). I have read that there is a cable that connects the keyboard backlight, and this could become loose during maintenance. Is this easy to find / check ?
Thanks

Just incase people have the same issue down the line, I managed to fix this problem myself within 5 minutes.
I found a guide on ifixit.com for my model of macbook and then looked at the logic board replacement section (as this is what repair it had been to apple for).
I found the section regarding the power ribbon for the keyboard lights, and after taking my mac apart, I realised that they had not connected the ribbon, and it was still left unattached under one of the fans.
Carefully connecting this back and then putting the fan back solved the problem. So a simple 5 minute job has saved me a long trip back to see apple.
Thanks for your help anyway guys!

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Question saya it all. Please help.

There are some sensors, probably beyond the top edge of the keyboard, that are intended to turn on the keyboard lights when the light levels are low enough. Normally, the light levels do not require the keyboard lights, so they stay off.
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My MBP mid 2010 display blackout and froze while working but my keyboard light will still light up. Won't be able to retrieve it and have to hard shutdown. Sometimes it happens a lot. Wether it connected to power or not, it will blackout on and off. Pleas

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Do you have a 15" mid-2010? If so then your problem is surely...
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Good luck,
Clinton

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Been into keyboard preferences and there his no illuminate keyboard box.

yes, there seems to be a keyboard problem in lion. So you don't see this screen:
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MegoStello,
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Simultaneously?
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I've got a MacBook Pro 2.4 GHz Core 2 Duo.
I have ALWAYS left the keyboard lights off for the 4 years I have had it.
But lately, no matter what settings I change or what I try, I cannot PREVENT the keyboard lights from coming on when I've been away from the computer for a long period of time.
Automatically illuminate keyboard in low light is NOT checked in System Prefs. I have reset the PRAM, and left the laptop off with the battery off for hours in hopes of resetting it.
Nothing will work. Almost every time I am away from my computer for hours, I come back and the keyboard lights are on. And when I tap the keyboard light brightness buttons, it just gives me the buster symbol (white circle with a line through it) on screen below the keyboard light brightness indicator for a few seconds. Somehow continuing to tap those buttons eventually makes the lights just turn off. Or holding my hands over the whole keyboard to trigger the sensor can suddenly allow me to control the on/off brightness with those buttons again. In which case I try turning the lights off completely or turning the brightness so low that it goes off.
But once again, when I wake up in the morning, I find the keyboard lights on.
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I have not tried deleting the user account yet because I actually want it and would find it very hard to believe that was the culprit. It's just the only thing I can think of that changed shortly before this started happening.
Is there anything else I can do!?! Is there some preference file that controls the lights somewhere that could be corrupt that I need to trash?
Thank you for any help anyone can provide. This one has stumped me good.

From reading up of other forums with the same problem i have come up with two reasons why it is doing that.
first try doing a smc reset
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Hello,
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Best Regards
Pawel

@kiki1871: This would be the last option I would take. I cloned the HDD before replacing it to avoid the whole OSX installation & backup procedure. I wonder if I could download the driver and install it now. Any hint wherefrom I can get it?
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Lost my keyboard light on MBP 13" there yesterday ...gone today

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