Computer does not sleep when lid is closed

Hey everyone,
Until about 15 minutes ago I had my powerbook G4 set to sleep whenever I closed the lid. Well, now it does not want to.
I installed a screensaver and used it for a little bit, and now uninstalled it.
The problem is, ever since installing and selecting that screensaver my computer won't sleep when I close the lid.
What is the process to restore this and get it so that it sleeps when I close the lid?
Thanks in advance!

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I have a 1ghz Aluminum Powerbook with the lower memory slot issue. Everything is working great (besides the memory issue of course), and this one other bug: When I close the lid, the powerbook does not go to sleep. I have to manually select "Sleep" for it to go to sleep. The sleep light comes on and all, but I guess it just doesn't recognize the display lid shut.
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Air does not sleep when lid is closed?

My friend just bought a new 13" Air and it works great except he was confused at the fact that when he closes the lid the laptop does not go to sleep. He noticed this when he closed the laptop in a dark room and the light from the screen was leaking out. Has anyone else experienced this problem? I know on older Apple laptops sleep mode was activated when a magnet in the LCD housing hit a sensor in the upper case when you closed the lid; is this still the case? And if so anyone know where the sensor is located just so I can run a magnet over it to see what happens?

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My issue is more complicated. I have made sure everything is up to date, all the settings that tell the system to sleep when the lid is closed are turned on. I have even turned those settings off off, just so I could turn them back on to make sure there wasn't something quirky about it.
I have tried restoring the system to factory settings using the recovery partition, as well as discs burned from the program that came with the computer. I have tried clean install from Windows 7, 8, and 8.1 discs.
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Thanks for the reply, gat0gelat0.
Yes, those settings were the first things I checked. I also tried changing it to "Do nothing", then changing back to the sleeping option. It still does nothing when I close the lid.
I would like the functionality of it going to sleep when I close the lid for the convenience, like when class ends, I have to rush to my next class, I just want to close the lid, put it in my bag and run to the next class. Keyboard shortcuts like Fn-F4 work, but this laptop should have the functionality I am describing, and I want to figure out why it isn't working and how to fix it.
I suspect there is an issue with whatever is used hardware wise to sleep the machine. Either it's not being triggered, or it's not there, or it's broken. I've tried running a magnet around the bezel of the LCD screen as well as around the palm rest bezel and there is no activity as I've read that many laptops trigger sleep by interaction by a magnet. Still nothing.

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Console.app will allow you to check various logs. The root system one should be reflecting any major issues, though be aware the description may not be in plain english.
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MacBook Pro does not sleep when lid closed

Hi there. I recently upgraded my MacBook Pro from Snow Leopard to Mountain Lion. Before the upgrade my mac would sleep automatically when the lid closed. However, ever since I've upgraded, when I close the lid, my mac doesn't go to sleep. However, if my mac isn't plugged in (running off the built in battery) it goes to sleep. I looked through system preferences and I can't seem to find any settings relating to this, does anyone have any suggestion on what's happening and how I can fix it? Many thanks in advanced.

Test after each of the following steps that you haven’t already tried: Step 1 Apple menu > System Preferences > Print & Scan > Open Print QueueCheck all printers for unfinished jobs. Deal with any you find. Step 2 Apple menu > System Preferences > Energy Saver > Power Adapter > Wake for network access: uncheck. You may need to unlock the preference pane by clicking the lock icon in the lower left corner and entering your administrator password. Step 3 Apple menu > System Preferences > Energy Saver > Schedule > Start up or wake: uncheck. Step 4 Apple menu > System Preferences > Sharing: uncheck all boxes. Step 5 Disconnect all wired peripherals except keyboard, mouse or trackball, and monitor, if applicable. Step 6 Launch the Activity Monitor application. Select All Processes from the menu in the toolbar of the Activity Monitor window, if not already selected. Enter “powerd” (without the quotes) in the "Filter" text field. Select the powerd process and click the Quit Process button in the toobar (stop-sign icon.) In the sheet that opens, click Force Quit. You’ll be prompted for your administrator password. The process will be relaunched immediately. Step 7 Reset the SMC. Step 8 Boot in safe mode and log in. The instructions provided by Apple are as follows:
Shut down your computer, wait 30 seconds, and then hold down the shift key while pressing the power button.
When you see the gray Apple logo, release the shift key.
If you are prompted to log in, type your password, and then hold down the shift key again as you clickLog in.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin. Note: If FileVault is enabled under OS X 10.7 or later, or if a firmware password is set, or if the boot volume is a software RAID, you can’t boot in safe mode. Safe mode is much slower to boot and run than normal. Don’t launch any applicationsat first. If sleep still doesn’t work properly, back up all data and reinstall the OS. After that, if you still have the issue, make a “Genius” appointment at an Apple Store to have the machine tested. If sleep now works as expected, go on to the next step. Step 9 Still in safe mode, launch the usual set of applications that are running when you have the problem, including your login items, one at a time, testing after each one. Some applications may not work; skip them. You might be able to identify the cause of the problem this way. Step 10 If sleep is still working after you’ve launched all the usual applications, reboot as usual (not in safe mode) and test again. If sleep still works, you’re done, at least for the moment. If you still have the sleep issue after booting out of safe mode, post again.

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Sometimes when I close my MBP display and put it in its case I find after coming back to it that it has not gone to sleep and the fans are running full speed. This has only happened twice (but still twice in two weeks is pretty bad), and it wasnt away for long but I can imagine this being VERY BAD for the computer.
Has anyone else had this problem???

This is worrisome.
I have the same problem. Several times I've closed the lid, put it in my case, and head home. When I get the computer out it can be piping hot. I'm worried that this may damage the machine, or even start a fire.
This is a new MBP. I've made no changes to power management settings. Since this happens frequently, I've tried closing the lid, unplugging everything and waiting a minute before moving it and putting it in my bad, but I still get the problem. (I even stare it at really hard, willing it to be asleep -- to no avail.) Of course, I shouldn't have to go through The 17 Steps of Putting a MacBook Pro to Sleep. I should simply be able to close the lid, unplug, throw it in its bag and go. Or maybe I'll unplug first, etc. It should be able to handle any normal scenario.
I may have to return this computer.

Computer does not sleep when inactive. White, solid indicator light on MBP.

I've done a bit of troubleshooting without favorable results. Here's the situation: The Macbook will not go to sleep from inactivity. If I close the lid it sleeps just fine, but it won't if I set the computer to sleep after a period of inactivity.
Take this example. Display sleep set to 10 min, computer sleep set to 15 min. At 10 minutes the screen will go black and the indicator will become solid white. At 15 minutes nothing changes and the computer will stay in this state perpetually.
I've rebooted the computer without opening any apps and this all still occurs. I've also checked the system with "pmset -g" and everything looks good. Here is the output from my most recent test.
Active Profiles:
Battery Power                    -1
AC Power                    -1*
Currently in use:
standbydelay          4200
standby          0
womp                    1
halfdim          0
panicrestart          157680000
gpuswitch          2
hibernatefile          /var/vm/sleepimage
sms                    1
networkoversleep          0
disksleep          10
sleep                    3
hibernatemode          3
ttyskeepawake          1
displaysleep          1
acwake                    0
lidwake          1
I'm at a loss trying to come up with what could be causing this. Any ideas?

Others have found that it works for a couple of times and you will be back to the no-sleep state. Consider reset as well.

Computer does not sleep when lid is closed

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