Yesterday evening, I turned my MBP on and I noticed that the keys weren't lighting up. I tried covering the sensor, and adjusting the settings, nothing happened. I had some additional RAM installed and I thought something may have come loose but we opened it up again and couldn't find anything.
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Also, this is odd: Yesterday when I first noticed the problem, I was under keyboard in the preferences and there is an option that you can check that says 'Automatically.' Now that's not there. I don't know, perhaps a setting somewhere was changed. Any help will be wonderful EDIT: also the buttons themselves are not working anymore since I noticed this change in the preferences screen. The icons are not appearing on the screen at all. I'm having trouble too. I'm typing right now and the keyboard is off.
If I lift the Macbook off my lap and tilt it towards me, it comes on for a second. Then when I put it down it goes out again. Also, F5&F6 (keyboard brightness) won't respond. It worked before but isn't responding now. Because the keyboard backlight is off?
If I lift the keyboard, then the brightness adj. I just moved the laptop to my tray table, closer to the outside light and the keyboard is now on. I haven't had this issue before.
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It's something new. It is darker where I had it on my lap so I'm a little perplexed.
The sensor is front right? It wasn't covered.
And if it was, wouldn't that make the keyboard stay on? The F5 and F6 keys do work, but the keyboard wasn't lighting up at all unless I tilted the laptop up or moved it off my lap. And at that time, when the keyboard was dark, the F5 and F6 keys were not responding. I would see the brightness level indicator on the screen, but there was a O with a line through it and all the lines indicating the brightness level were greyed out. It's dark outside and I'm sitting in a fairly dimly lit room now and the keyboard is lit and staying lit, so I don't know what was going on. I'll see if it happens again tomorrow morning. The F5 and F6 keys do work, but the keyboard wasn't lighting up at all unless I tilted the laptop up or moved it off my lap.
And at that time, when the keyboard was dark, the F5 and F6 keys were not responding. I would see the brightness level indicator on the screen, but there was a O with a line through it and all the lines indicating the brightness level were greyed out.
It's dark outside and I'm sitting in a fairly dimly lit room now and the keyboard is lit and staying lit, so I don't know what was going on. I'll see if it happens again tomorrow morning. I've had the same issue. Here's the story with solution: After adding some new RAM I've noticed, that the keys weren't lighting up.
Also under keyboard in the preferences the 'Automatically.' Wasn't there anymore. Exactly as Amanda described. SMC and PRAM resets didn't help. Long surfing sessions and countless forums later I found a hint guiding my attention to a tiny cable which is easily disconnected working on the RAM.
If you're sitting infront of your open MacBook in order to change the RAM, the corresponding cables are on the left hand side. They are really small, bifilar and covered with a small piece of cellotape.
This cable was disconnected, so I fiddled it into the right place and covered it again. I closed the backside and started the Mac Daddy. The keyboard was still not working. This changed after a last SMC reset. Backlight is back and I am happy.
Hope this is going to help you. Regards from Germany.
Click to expand.I had the same problem. I upgraded the Ram and somehow a small tab dislodged without me knowing. The illumination keys (F5 and F6) was unresponsive. I tried setting the SMC which then meant that the illuminate keyboard entry under system preferences/keyboard disappeared. Having just opened up the back I noticed a minute cable had been dislodged near to where the RAM is. It is really fiddley to replace and you need something like a toothpick to guide it back in. Once in you need to reset the SMC to recognise the backlight function and thereafter the backlight function should reappear and the backlight should work again.
However, I must admit I am a novice when it comes to computers and will never try to install RAM again for fear of something else going wrong. Simila but different i have also had a problem were my F5-6 would stop working with no change. But the difference is i have not done any upgrades and the lights still work. I just dont have control over them from my account. As soon as i go to the login window i can change the backlighting with the F5-6 but once i am back in my account i lose controll over the lights again.
So basicaly if i whant to use my backlight keyboard i have to go to the login window change it to what i want then log back in. Click to expand.hello there! Hi guys it's my first message here i really need your help. I changed ram on my macbook pro late 2011 for the third time, i always did it without any trouble.
This time, ive noticed that the backlight keyboard is not working anymore. I tried to take a look on the cable (21 cable in the picture) but i didnt understand one thing: do i have to insert in, sliding it or it's just a 'touch' connector and i have to push it on the connector and cover it with the little black plastic piece?
Because i tried to fix it but is not working anyway thank you. Hi guys it's my first message here i really need your help. I changed ram on my macbook pro late 2011 for the third time, i always did it without any trouble. This time, ive noticed that the backlight keyboard is not working anymore. I tried to take a look on the cable (21 cable in the picture) but i didnt understand one thing: do i have to insert in, sliding it or it's just a 'touch' connector and i have to push it on the connector and cover it with the little black plastic piece? Because i tried to fix it but is not working anyway thank you.