Keyboard disconnecting during iMac sleep..

This happened twice last night. iMac on sleep all day, then I used it briefly. Put it back to sleep, and a few minutes later, screen turned on with "keyboard connection lost" icon displayed.
My keyboard's battery power is currently at 20%. Could this be the reason?
Thanks for any insight!

It's possible. The only way you will know is if you use some fresh new batteries. Post in the Bluetooth forum area - http://discussions.apple.com/category.jspa?categoryID=145
Message was edited by: CMCSK

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Keyboard disconnects during sleep...

Recently I noticed again this notorious "no wake from sleep" problem. This time the keyboard will disconnect and even unplugging, re-plugging a USB device will not wake the MP. Strangely I can hear the disks spinning. So it may be only my SSD with the system that's sleeping? The only way to wake it up is hard shut down and restarting.
[Stupidly I went to Mavericks instead of staying with MountainLion some weeks ago]
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Hi himbear,
I apologize, I'm a bit unclear on the exact issue you are describing, or what machine/configuration this is occuring with. If you are having issues with your machine not waking from sleep correctly, you may find the troublehshooting steps outlined in the following article helpful (apologies if you have already seen it):
OS X: When your Mac doesn't sleep or wake - Apple Support
Regards,
- Brenden

Ethernet disconnects when imac sleeps

When i put my imac to sleep, it seems to disconnect from the ethernet that is plugged into the back.
When i wake it up and log it back in, any applications that was signed in, like lync messenger are logged out and it takes a good 10 seconds to be able to browse the internet.
I'd love to just put my display to sleep and not the computer itself, however I work in an office and need to be able to lock my machine when i walk away.
I use CMD ALT EJECT to put my imac to sleep. And i am using the latest OS.
Please help

Try the following suggestions:
http://support.apple.com/kb/HT3964 Intel-based Macs: Resetting the System Management Controller (SMC)
Require a password after waking your Mac
How to lock your screen in OS X
=============
And i am using the latest OS.
Which is Yosemite. According to your profile you show--> OS X Mavericks (10.9.1)
Conflicting info: Please update/correct your profile so that you can receive the correct troubleshooting suggestions. This will assist the users in trying to help you. Thank you.

Keyboard disconnect after Mac sleeps

When I wake my Mac after it's been asleep, I am presented with the login screen. Normally, I type my password and login. But since a couple of weeks ago, my bluetooth keyboard doesn't work anymore. I have to hard poweroff the Mac, and then during startup, they keyboard works normally. The Mac is just dropping the keyboard... what gives?

Thanks for replying. To clarify a few details you asked about:
The Airport Express (v. 7.6.4) is connected via the Ethernet 1 port to a Power Mac running OSX 10.9.5 (Mavericks). The AP Express is in "Join a wireless network" mode, and it connects to a LAN consisting of a cable modem/router, and a few devices such as a "smart TV." There is no Apple Wireless router involved. The cable modem/router assigns IP addresses to all devices, with no apparent problem except for the Ethernet port/Airport Express.
I tried the Network Prefs option "Configure iPv4 Using DHCP with manual address" but that didn't change anything. I've also tried setting the Mac to "never sleep" mode, but that made no difference either. I don't know exactly what you mean by a static IP, but right now I'm trying ""Configure iPv4 Manually."
I don't know anything about "sleep" settings for an Ethernet port, but I'll study your macrumors link to see what I can learn.
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How can I troubleshoot this problem with the iMac keyboard? My keyboard disconnects and reconnects within seconds but all the typing is lost while it was offline. This is usually 5 seconds or less but happens 2 or 3 times in a minute. Annoying!

My wireless keyboard disconnects and reconnects within seconds but all text that was typed during the time offline is missing. i have to go back and retype missing parts. What can I do to troubleshoot this. The computer is only about six month old. This problem is new in the last couple weeks. Thanks for suggestions.

Beat me to it, Donald. But there is a possible alternative. If the batteries have been replaced since new, were they replaced with the same batteries or another make. There are examples around which do not fit perfectly and leave a certain amount of movement inside the battery housing. That could lead to instability such as the OP describes.

Wireless Keyboard Keeps Disconnecting From iMac

When leave my iMac overnight my keyboard disconnects alone. This didn't happen before (3 months) and now all of a sudden it's disconnecting......
Can someone help me with this?

I have been trying to get my wireless apple keyboard to connect to my MacBook (13" late 2008) for some time without success. It sometimes recognizes it, but always fails to connect. Fresh batteries don't seem to help this situation.
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I first noticed the issues a couple of weeks ago - mid-2007 iMac, running SL.
The iMac will sleep fine if I use the command in the apple menu or the power button.
But it won't sleep automatically as suggested in the Energy Saving preference pane. If I select the 'sleep' keyboard combination (option, command, eject), the iMac sleeps but instantly wakes again.
I've tried everything! These problems aren't due to peripherals - it was working fine with the same peripherals connected. Wake for LAN isn't selected, nor is the wake for BT option (and I don't have any BT devices). I've looked in Activity Monitor and Console and can't find any obvious process that might be keeing the Mac awake. I've tried restoring plists from a TM backup, deleting plists, resetting the PRAM and SMC. One of these measures (not sure which one) worked ONCE. But when I went into the energy saving preference pane, it stopped sleeping automatically again.
My main concern is the lack of auto-sleep. I've scoured the forums and no one seems to have this problem together with the mac waking instantly after the sleep keyboard combo. I'm hoping this peculiar combination of probems might shed some light on what's causing them.
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Can be very hard to impossible to track down auto sleep issues. Just get PleaseSleep.
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IMac - sleeping problem

Hi Guys,
i have new model of iMac (Late 2012 with 10.8.3) and i have in my point of view problem with "deep sleep".
1) after about 60 min (pmset -g, timer - autopoweroffdelay14400) away from keyboard iMac sleeps "deep sleep".
2) no possible to wake-up with keyboard or mouse
3) only power buttons work
4) iMac needs two login, first for FileVault and second to the System (why ? on MacBook Air you need only one)
5) all applications starts again (why ? The new start take 1 or 2 minutes :-((( On MacBook Air all applications starts where im finished, no restart, etc. I can working instantly without waiting)
6) no applications (for example iTunes) can't prevent iMac from this type of sleep. If i listen to iTunes (music play, using remote to change albs, etc.) and after about 60 minutes away from the keyboard, iMac sleeps (why ?)
7) in this type od sleep can't use remote desktop from through internet (use AirPort Extreme), no possible iMac to wake up (you need to push power button, why ?)
8) in this type od sleep no application can't iMac wake-up. For example remote from iOS :-(
What i try to fix my problem:
1) in pmset set sleep to 0, iMac now can wake-up with keyboard and mouse
2) restart SMC and PRAM https://discussions.apple.com/docs/DOC-3603
3) repair disk permissions http://support.apple.com/kb/ht1452
4) delete sleep file http://www.maclife.com/article/howtos/how_remove_diskhogging_sleepimage_file_you r_mac (BTW: my sleep file have only 2G and i have 16G RAM)
5) in pmset set autopoweroff to 0
6) in pmset set hibernatemode to all modes
7) in pmset set sleep to 0 (i try to sleep to never, but iMac sleeps again)
8) in pmset set setautopoweroffdelay to 0
Nothing helps :-(
Do you have any recommendation ? In next steps i try to erase whole system and install new vanilla and will see :-(((
Thank you guys ! Im so tired :-)))

Have you tried "fsck -fy" repairs under single-user mode?
http://support.apple.com/kb/ht1492
Reboot and hold down the Command (Apple) and S keys before the grey screen appears.
Wait for the command prompt, then type:
sbin/fsck -fy
Repeat that command until "file system was modified" is no longer reported back, type:
reboot
Or try Titanium Software's "Onyx": http://www.titanium.free.fr/downloadonyx.php (not affiliated)
Check your preferences for corruption: Under the "preferences" tab, within the "Verify" tab.
Hope that helps.

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Jeffrey, Welcome to the discussion area!
I believe that there are 2 issues here. One is how the iMac handles incoming calls. The other is that your telephone service has to send a signal when there is an incoming call.
In traditional phone service, if you are using the phone and someone tries to call you, their call is blocked at the switch (at the telephone company) and they hear a busy signal.
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Close All Open Apps... Perform a Reset... Try again...
Reset (No Data will be Lost)
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430
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Keyboard disconnecting during iMac sleep..

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