My laptop randomly goes into sleep mode

I'll randomly be on a site or listening to music and then all of a sudden it goes into sleep mode. I'm very aware that it goes to sleep while you've been away from your computer, but it'll go into sleep mode while I'm using the computer. I changed the power setting so that it takes longer to get into sleep mode thinking that would help, but it doesn't. I ignored it at first but it happens more often now and its getting annoying. Sometimes I'll move the mouse pad to wake it back up and it sounds like its going to come back, bit it just goes to sleep again. Its really annoying and frustrating and I don't know what's wrong with it. Anyone have any idea what's wrong with it and how to fix it? My warranty expired this passed March and I can't afford to get it fixed.

"I put a new anti virus on my computer and the sleep mode problem didn't happen after I removed hazardous files on my computer."
Go to any good anti Virus removal forum, SpyBot S&D, Bleeping Computer, others, and start a thread.
They probably will want you to run a DDS log, ERUNT, follow there instructions!
The forum Volunteers that assist you on these sites are busy and it may take up to 3 days for them to start your thread, have patience, they will help.
You may have inadvertently removed/modified part of your operating system (keylogger/screencapture) when removing the malware.
Do not just rely on a recovery point!
Hope you have recovery disks made, and/or a mirror image.
> Was your question answered? Mark it as an Accepted Solution!
> See a great post? Click on the white star and give it a Kudos!

Similar Messages

Mac Pro randomly goes into sleep mode

My (mid 2010) Mac Pro, OS X.6.8, randomly goes into sleep mode and I can't wake it, have to power it off and reboot. Just started to the best of my knowledge Friday (Jan 6, 2012) I've had it happen surfing the web in Safari, while working on an illustration in Adobe Illustrator, while running Apple Hardware Test, using 23" LCD connected by HDMI and DVI-D, Disconnected monitor and connected 12" Cintiq (LCD Tablet).
The monitor goes black, says "there's no signal coming from your computer", none of the keys will wake it. I have to hold down the power button until it turns off then power it back up. The time between the sleeps varies, 38min, 1hr 34min, 5min, 2hr 17min, 12min, etc. I disconnected everything (except keyboard, mouse, monitor) still the same. Opened and removed the ATI Radeon HD 5870, and noticed the PRAM battery, replaced it with a new one, thought that fixed it, worked for a long time then it happened again.
Tried Apple Hardware Tester again, it said everything is fine, ran it again an error popped up: 4SNS/1/40000000:Te1S-99.364, wrote it down then it slept.

The next time this happens open your mac and see if there is still a fan running. If so you are not sleeping, you are in a thermal cutoff. Keep you mac cover off.
Now reboot as you always do. Take a look at the fan in your 5870. Is it spinning? If so, try to keep an eye on it and see if you can "catch" it not spinning.
When the fan doesn't start, or if it does then stops, the card will overheat and the machine will go into thermal cutoff. The amount of time is variable.
I speak from experience. I am currently on my third 5870 video card. Both the previous two had this fan problem. The only wrinkle in my theory for you is that I wouldn't expect more that, say, 15 minutes of up time at the most, not hours like you got. But it may be that your card is starting ok, but stops sometime later. I chalk it up to the lousy fans Nvidia uses in the 5x70 cards.
FWIW, if you happen to catch the fan stopped before the machine goes into thermal cutoff you can give it a little nudge with your finger to get it going again.
I recommend one of the various temperature monitors. I use iStat Menus and display some key temps in my menu bar. Of course after going through two of these cards I am a bit paranoid!
Some other temperature monitors:
iStat Pro
Temperature Monitor
Hardware Monitor
Note, after typing all this I also realized you got a AHT 4SNS error. I would run AHT again to see if you get that error again. If so that means "Check Main Logic Board" and you may have a more serious hardware problem than just a video card! So my other recommendation is that when you machine fails again look inside for any lit diagnostic leds. There's some near the dimms but there are others on the board as well.

Imac Randomly goes into sleep mode...Hard to start

My IMAC G5 will randomly go into sleep mode while I am in the middle of using it. Typically the fan noise increases and than it auto goes into a sleep mode. It also has issues starting. I have to press and hold the power button for it to kick on while also hitting keys on the keyboard to trigger it. Help!?

Here is the system log it looks like its over heating?
Sep 22 20:37:11 Macintosh-2 mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00805E00   en0/6 to FF02:0000:0000:0000:0000:0000:0000:00FB:5353 skt 8 error -1 errno 50 (Network is down) 1852846483
Sep 22 20:37:11 Macintosh-2 mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00805E00   en0/6 to FF02:0000:0000:0000:0000:0000:0000:00FB:5353 skt 8 error -1 errno 50 (Network is down) 1852846774
Sep 22 20:37:12: --- last message repeated 1 time ---
Sep 22 20:37:12 Macintosh-2 mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00805E00   en0/6 to FF02:0000:0000:0000:0000:0000:0000:00FB:5353 skt 8 error -1 errno 50 (Network is down) 1852847774
Sep 22 20:37:13 Macintosh-2 kernel[0]: UniNEnet::monitorLinkStatus - Link is up at 100 Mbps - Full Duplex (PHY regs 5,6:0x45e1,0x0005)
Sep 22 20:37:15 Macintosh-2 kernel[0]: IOSMUPwrController:: OverTemp notification
Sep 22 20:37:15 Macintosh-2 kernel[0]: PowerManagement emergency overtemp signal. Going to sleep!IOPMSlotsMacRISC4::determineSleepSupport has canSleep true
Sep 22 20:37:15 Macintosh-2 mDNSResponder[23]: Note: Frequent transitions for interface en0 (70.162.10.190); network traffic reduction measures in effect
Sep 22 20:37:21 ip70-162-10-190 configd[35]: setting hostname to "ip70-162-10-190.ph.ph.cox.net"
Sep 22 20:37:24 ip70-162-10-190 kernel[0]: System Sleep
Sep 22 20:37:24 ip70-162-10-190 kernel[0]: System Wake
Sep 22 20:37:24 Macintosh-2 kernel[0]: Wake event 0020
Sep 22 20:37:24 Macintosh-2 configd[35]: setting hostname to "Macintosh-2.local"
Sep 22 20:37:24 Macintosh-2 mDNSResponder[23]: Note: Frequent transitions for interface en0 (FE80:0000:0000:0000:0214:51FF:FE97:7AA2); network traffic reduction measures in effect
Sep 22 20:37:24 Macintosh-2 mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00805E00   en0/6 to FF02:0000:0000:0000:0000:0000:0000:00FB:5353 skt 8 error -1 errno 50 (Network is down) 1852859586
Sep 22 20:37:29 Macintosh-2 kernel[0]: USB (EHCI):Port 1 on bus 0x4b has remote wakeup from some device
Sep 22 20:37:29 Macintosh-2 mDNSResponder[23]: mDNSPlatformSendUDP sendto failed to send packet on InterfaceID 00805E00   en0/6 to FF02:0000:0000:0000:0000:0000:0000:00FB:5353 skt 8 error -1 errno 50 (Network is down) 1852860588
Sep 22 20:37:31 Macintosh-2 kernel[0]: UniNEnet::monitorLinkStatus - Link is up at 100 Mbps - Full Duplex (PHY regs 5,6:0x45e1,0x0005)
Sep 22 20:37:32 Macintosh-2 mDNSResponder[23]: Note: Frequent transitions for interface en0 (70.162.10.190); network traffic reduction measures in effect

Early 2008 iMac (8,1) randomly goes into sleep mode

Hey,
My early 2008 iMac (8,1) on 10.8.2 goes into sleep mode by itself. I've played around in Energy Saver, tried resetting SMC, NVRAM, replaced HDD, reformatted HDD, installed smcFanControl, reinstalled Snow Leopard, Lion, Mountain Lion. None of that worked. Took it to the Genius bar, performed some diagnostics tests and they said everything worked properly. Does anybody have the same problem? I can still use the computer for general computer use (light web surfing and e-mailing), but it seems to go into sleep mode when I have a lot of applications open and especially when watching videos. I've tried researching this problem, but I've haven't found a definitive answer. Right now, the Genius that I've been talking to thinks it may be the RAM. I'm waiting on new shipments of test RAM to arrive at the Apple Store for him to properly diagnose.
Thanks,
Jason
iMac (8,1)
2.8 GHz Intel Core 2 Duo
2x2 GB 800 MHz DDR2 SDRAM
ATI Radeon HD 2600 Pro 256 MB
1TB 7200 RPM SATA ST1000DM003-1CH162
If you want to read the whole time line, I've included it here. I apologize for it being so long.
At first I was running Lion (10.7.5) and the computer would enter sleep mode whenever I was doing anything with video. For example, watching YouTube videos and chatting on FaceTime. And funny enough, I distinctly remember watching a bunch of movies with VLC and the computer did not go to sleep (Although, this is not true anymore). I could wake the computer up and use it, however within a few minutes the computer would re-enter sleep mode. The computer seemed fine and I could access all of my files. Tried resetting SMC and it did not resolve the issue.
I made a Genius appointment to see if they were familiar with the issue. The iMac passed the in-store diagnostics test; it said all the components were functioning properly. He told me to bring it home to do a fresh re-install of my OS and then run my computer to see if the problem persisted. I took it home and reformatted my HDD with a 35-pass erase, re-installed Snow Leopard (10.6.8) and declined to transfer any backups from Time Machine. I was using a fresh system and sure enough, the problem persited. Tried doing the same thing again but with Lion (10.7.5) and still no luck. So I made another appointment and it passed the in-store diagnostics test again. I let them keep the computer for a 24-hour diagnostics test. They told me they would diagnose my computer with the OS on my HDD as well as a copy of OS that the Apple store deemed 'good' on an external HDD. The Genius called me and told me that my HDD failed their 24-hour diagnostics test and recommended I replace it. I initially had a 750 GB HDD, and the Apple Store could only offer me a 500 GB HDD ($200). I opted to take my computer to Carbon Computing, an authorized dealer in Toronto, to have a 1 TB Seagate HDD ($170) installed with no OS on it. I brought it home, performed another 35-pass erase and installed Snow Leopard. Problem still persisted. Repeated with Lion, still unsuccessful. Looking back, I was so excited that I just had to replace the HDD to fix the problem, I forgot to ask the guy if he could recreate the issue.
I began to suspect that it was a heating issue. So I installed Temperature Monitor and smcFanControl, and cleaned the fans as much as I could without taking the computer apart. Without smcFC on I tried to recreate the problem and I noticed that the Power Supply Position 1 reached 95 degrees Celsius, and Graphics Processor Temperature Diode reached 97 degrees Celsius before entering sleep mode. I don't know much about temperature sensors and what they monitor specifically, and so I couldn't draw any conclusions from that data. I turned on smcFC and cranked the optical drive speed to 2000 RPM, HDD to 3000, and CPU to 3000. The computer still went to sleep but the temperatures were below 90 degrees Celsius before entering sleep mode. I've tried researching here and on the internet about normal operating temperature ranges of iMacs and generally found that most do reached that temperature but they do not go to sleep mode.
Then I thought it may be a problem with Lion so I upgraded to Mountain Lion. The issue still persisted. Tried resetting SMC and NVRAM, did not resolve issue.
I called the same Apple Store explaining to them that their recommendation of replacing the HDD did not resolve the issue. They told me to bring it in and have them check it out again. I went through the same process I did before; the iMac passed all of their diagnostic tests. The Genius told me this time he will test out the RAM. He called me and told me that he could replicate the problem and so he proceeded to put in a stick of 'good' Apple RAM, but the computer would not work. He said the 'good' Apple RAM was damaged, either before or in the process of putting it in. He plugged in my old stick of RAM and the computer worked. He tried to recreate the problem and claimed that the computer ran for over 24 hours with an existing movie on my HDD playing and it did not go to sleep mode. However, once I brought it home I played the same movie right away and it turned off 17 minutes into the movie. Tried resetting SMC and NVRAM again, ran the movie again, still went to sleep.
And that's the story for now...

Now to find out WHY it does it at home only. How hot is it at home? Have you checked the AC current/voltage at home?
Well they were able to replicate the issue at the Apple Store the second time I left my computer there. Anyway, we don't have any heating on at my house at the moment. It's usually from around 20-23 degrees Celsius (72-75 F). Temperature Monitor says ambient temperature is 30 degree C though...
I'm not really sure how to check the AC current/voltage at home, but my computer worked before I moved it. So I'm not sure if that is the issue.
I normally only have speakers set up to my computer and a wired keyboard. The speakers are powered separately. I would assume that at the Apple Store only the power cord and wired keyboard are connected.
What is the Power Supply Position? And what does it do?
Thanks for your help!

My iPad randomly goes into sleep mode while I am using it?

All of a sudden, when ever I use my iPad 2 it goes into sleep mode. It did it three times while I typed this message. As I am running an app it will just go into sleep mode with out me doing so and I have to press the home button to wake it up. Doesn't matter what app I am running. I have 4gb of storage available. Most of the time it brings me back to the app I was using when it went to sleep. Has anyone else suffered this issue. I am running the latest iOS 6.0.

What "issue"? This is perfectly normal. By default, all (fairly-recent) Apple products will go to sleep if left idle for a certain period of time. This is NOT normal, however, if in the app, you are pressing buttons on the screen. If you are doing something like reading, for example, try setting your iPad to not go to sleep that quickly.
(Google how, I don't completely remember.)

Week old IMac G5, Version 10.5.2, goes into "sleep" mode randomly....

My sister has a brand new IMac G5, OS X version 10.5.2, the screen randomly will go black, it still stays on, it's like it goes into sleep mode, but force quit wont work, nothing works, restart is required in order to get out of it.
On another note, when she restarts the computer, and sometimes when she's just starting it up not on a restart, the computer will have colored lines running down the whole screen, when it gets to the blue loading screen, it freezes there, where once again it requires a restart. Problem is, the computer is less than TWO WEEKS OLD. I've had my mac for years and cant figure out the problem, anyone that knows of, or has had similar problems and had them fixed that could help out would be nice. Thanks!

In fact, what your sister has is an intel iMac, not a G5, those were discontinued a couple of years ago. She has telephone support for 90 days and should call Apple immediately for a solution to her problem.

My new macbook pro retina randomly goes into standby mode

My new macbook pro retina randomly goes into standby mode. I have to close the screen and wait a few seconds and re-open it in order for it to come back on.
Sometimes it immediately goes back into standby mode again after closing and reopening the screen. I have checked the battery level everytime, and it has never been below 40% when this occurs. Is this a Mountain Lion issue?

Well I fixed my problem.
I took it into the Apple store. Even without the other two monitors they were able to recreate the problem. One symptom (I had) was that one of the Hot Corners was set to Disable screen saver. If you then put your cursor there, you'd go into screen saver mode. Change the setting to another corner and the problem follows you there.
The Apple person at the Genius bar logged out as me and back in as test and same problem. He tried some stuff and finally said I needed to wipe the drive and reinstall the OS (Lion). I'd only had the machine for 12 hours and had just migrated my data to it, so I didn't mind doing that. I did it at home.
Problem solved.
BUT... then I reinstalled the driver for my EVGA UV Plus 19 (most current drivers) and bingo problem back. Uninstall. Problem gone. I'm now using mini display port to DVI for one monitor and HDMI for the other I think the machine is a bit warmer this way (versus using a USB to the EVGA device) but at least it's not sleeping all the time. Someone might say "it (the heat) is your imagination" or something else. Or someone might say "use the other thunderbolt port for another mini-display port to DVI" but I need that for the LAN... c'est la vie.
Maybe I'll write to evga and see what they say. Maybe they'll fix their driver and/or Apple will fix it.

HP Envy shutting down after going into sleep mode

Hi. I'm not sure where to post this so I'll try it here.
My laptop shut downs automatically when it goes into sleep mode. Not right away when going into sleep mode. Maybe like an hour later after going into sleep mode.
I'm not sure it's overheating because it never shuts down while I'm actually using the laptop.
Do you guy have any idea how to fix this?
Product name and number: HP ENVY TouchSmart Sleekbook 4-1115dx
Operating System: Window 8
Error Message: None
Any changes to your system before problem occurred: No

Hey Tecmo_SB_Guy,
I would suggest you take a look at advanced power settings. It can seem like the notebook is turning off when it is actually just hibernating. You can set it to not hibernate.
1. Windows key + Q to open the Search Bar
2. Type "power"
3. Click Settings under the Search Bar
4. Select Power Options from the results on the left.
5. In Power Options, Click Change when the computer sleeps, on the left.
6. Set the Put the computer to sleep setting so that it fits your usage best.
7. Click Change advanced power settings, at the bottom.
8. Expand Sleep and expand Hibernate after. If you want you can change the hibernation setting to Never by typing "Never" into the minutes field. See attached picture. You can do this for battery and/or plugged in.
9. Click Apply to save changes.
If you don't already shut it down periodically, I would suggest shutting it down at least 2-3 times a week if you use it daily. Leaving the computer running continuously can shorten its lifespan. Hard drive failures and motherboard issues are seen much more often on machines that are left running constantly. Computers get bogged down and run slowly when the memory is full. Memory only clears out and resets itself when the computer is shut down. Here is a link explaining more about memory accumulation and hardware aging.
I hope these suggestions help! Please let me know if you have any questions
Attachments:
PowerHibernateNever.jpg ‏59 KB

Mac Tower Pro 10.8.5 keeps going into sleep mode

Purchased from Apple, refurbished 2012 Mac Tower Pro. At the same time, purchased a new Dell U2713HM, 27" monitor.
Have been operating on this new system since about the first week of December 2013.
Issue:
The computer has constantly gone into sleep mode after a few minutes of no activity. I can have iTunes radio playing, but the system still goes into sleep mode. As I am typing and moving the curser, the machine stays awake.
This has caused much frustration because when it goes into auto sleep mode, it quits all programs that I am in, and when it does this, I lose all the work I had accomplished. It litterally closes everything and goes to sleep in about 2-3 minutes of no activity.
BTW: the computer and monitor have all its new OEM cables that came in the box, when I purchased the units.
Solutions attempted:
System Preferences — Energy Saver: computer sleep and display sleep set to "never" and unclicked the box "Put hard disks to sleep when possible."
Dell settings: Turned off all energy savers.
Results:
Nothing. Problem persists.

I apologize for the angst. The problem has cost too much money in lost time and material because when it would automatically shut down after a few minutes, all my work was lost.
I misunderstood the terms of the warranty. Thank you for your input and patience. Much appreciated. For the benefit of others that experience this with a new Mac that auto shuts down. Check the following:
1. Go to System Preferences.
2. Click on Security and Privacy.
3. Click on Advanced (bottom right corner)
4. If the first line is checked (Log out after 5 minutes of inactivity); uncheck it and then click OK button.
5. Be sure to click the lock before existing Security and Privacy.
Now the machine will cease shutting down programs to go into sleep mode as soon as machine is inactive for a few minutes.

HP Officejet 4620 All-in-One Loses Connection to Wireless Network When It Goes Into Sleep Mode

My HP 4620 All-In-One wireless printer works fine until it goes into sleep mode. Once it goes into sleep mode, it doesn't wake up if a print job is sent to it. If I wake it up manually by pressing the blinking on/off button, it still doesn't print. If I completely turn it off and then on again, the print job that was queued on my computer will start printing, but that's a huge pain and waste of time nearly every time I want to print. I've installed all available updates. I also assigned a static IP address in an effort to correct this but nothing helps. I see that others have complained about this problem, but I do not see that anyone has had success resolving this. My operating system is Windows Vista. I use a Link-Sys Wireless G Router. Thanks.
This question was solved.
View Solution.

so I have called HP tech support 12 times over the last 6 weeks and still my HP Officejet 4620 loses connection overnight. Of course becasue it was a birthday present I spent more time than I normally would have on this issue. While the tech are very polite they have not fixed my problem and now it is too late to return printer to store. This is a lot of money wasted and I think they need to admit this is a bug in this printer and resolve the problem!!!!!

How can I select shutdown & close the display w/o going into sleep mode?

I have learned to wait untill the MBP full shuts down before closing the display. In the past I have pressed shutdown closed the display only to find out later the MBP goes into sleep mode before fully shuting down. When I reopen the display the computer finishes the shutdown process or worse the battery is dead.
I would like to select shut down, close the display and walk away while the computer completes the shutdown process.
Is there any setup options or apps. that will allow this?
Thanks, Joe
(new to the mac)
MBP Mac OS X (10.4.6)

Well hello there, and welcome to Macintosh.
Unfortunately you can't change anything to stop this from happening. The shutdwn process goes about its business killing processes and applications that have been running. The sleep process interrupts ALL business going on in the OS, and puts the machine into low power mode, as it is not aware of the nature of the running processes (in this case, the shutdown process), knowing only that they must be slept and the machine dropped into sleep mode. You gotta wait it out before you close the lid.
I would suggest sending a message in OS X feedback requesting this as a feature!
If you find this response helpful or if it solves your issue, please click the appropriate icon in the header of this reply.

IPhone 3gs wont turn back on once it goes into sleep mode!

2 days ago my iPhone 3gs (OS 6.0.1) has gone completely wacko on me and i'm completely frustrated! I have my phone set to have the screen shut off after 5 minutes. Usually, to just reaccess the phone I just simply hit the home button. Now, if I let it go into sleep mode, the phone WILL NOT come back on! I went online and did some research, and it suggested holding the home button and the sleep button for 10 seconds to get it to come back on. It works most times, but sometimes it takes a few tries to get it to come back on, and when it does come back on it takes forever to load up. But the whole thing happens all over again when it goes into sleep mode. My phone is fine as long as I set it to never go into sleep mode, but it is killing my battery. I need to be able to put it into sleep mode as I have to be able to go all day without charging it at my job. PLEASE help...I don't know what's going on with it. I have never done anything to it (jailbreaking, illegal stuff, etc.) and I do all the updates that it asks to do.
Please please help!
Jennifer.

If you actually see a "6" error code, here's what it means. Disable your anti-virus and/or firewall.
Errors related to third-party security software
Error 2, 4 (or -4), 6, 1000, 9006
Follow Troubleshooting security software. Often, uninstalling third-party security software will resolve these errors.
There may be third-party software that modifies your default packet size in Windows by inserting a TcpWindowSize entry into your registry. Your default packet size being set incorrectly can cause these errors. Contact the manufacturer of the software that installed the packet size modification for assistance or follow this article by Microsoft: How to reset Internet Protocol (TCP/IP).
Verify that access to ports 80 and 443 are allowed on your network.
Verify that communication to albert.apple.com or photos.apple.com is not blocked by a firewall, or other Internet security setting.
Discard the .ipsw file, open iTunes and attempt to download the update again. See the steps underAdvanced Steps > Rename, move, or delete the iOS software file (.ipsw) below for file locations.
Restore your device while connected to a different network.
Restore using a different computer.

Late 2012 Mac mini with OSX 10.8.2 has started shutting down instead of going into sleep mode.

Sometime in the last week or so my mac mini has started going into full shut down instead of sleep mode.
I have tried checking and unchecking energy saver boxes but haven't found anything which will get me back to where I used to be - and I haven't knowingly changed anything to make this happen.- maybe an OS update caused it?
The machine will fire up with a tablet click rather than needing the reset button to be pushed so clearly the machine is sort of halfway between sleep and full 'off'. Most frustrating as one of the key issues for me in getting this my first mac was its easy sleep and super quick fire up compared to windows.
Any help appreciated
Oh yes I just remembered that I did just install 2 8gb of crucial RAM (to replace the supplied 2 2gb but surely that can't have anything to do with it - can it)?

Adding to my first post I can now advise that when the mac goes into sleep mode the light on the front stays on (it does not pulse so clearly it is not really sleeping).
When i click the tablet / keyboard this is actually what triggers the mac to reboot
I have tried resetting the SMC as per the following link to no avail
http://macs.about.com/od/usingyourmac/qt/Resetting-The-Smc-System-Management-Con troller-On-Your-Mac.htm
Help please!

Streaming audio from my IPAD to my Apple TV from Rhapsody application. when Apple TV go into Screen Saver mode, about 5 minutes after that it stops playing the Audio Stream and goes into Sleep mode.

I am Streaming audio from my IPAD to my Apple TV from Rhapsody application. when Apple TV go into Screen Saver mode, about 5 minutes after that it stops playing the Audio Stream and goes into Sleep mode. I am using the Optical Out from the Apple TV to my receiver, the Apple TV is hard Wired to the Network, the IPAD is Wirelessly attached to the network (it continues to play the Audio Stream). When the Apple TV is turned back on it resumes playing once I manual select it for output from the IPAD. All device are on current releases of software. I have no Video hooked up to the Apple TV. How do I correct this?

Intermittent problems are often a result of interference. Interference can be caused by other networks in the neighbourhood or from household electrical items.
You can download and install iStumbler (NetStumbler for windows users) to help you see which channels are used by neighbouring networks so that you can avoid them, but iStumbler will not see household items.
Refer to your router manual for instructions on changing your wifi channel or adjusting your multicast rate.
There are other types of problems that can affect networks, but this is by far the most common, hence worth mentioning first. Networks that have inherent issues can be seen to work differently with different versions of the same software. You might also try moving the Apple TV away from other electrical equipment.

24" imac goes into sleep mode and lights on circuit flicker

Hi -
I have a 24" imac and have found that when the display goes into sleep mode the lights on the circuit flicker.
I have searched the web and other users have complained of the same issue with no resolution.
Here is a similiar post - https://discussions.apple.com/thread/2606099?start=0&tstart=0.      The resolution is probably you need to get the iMac serviced, what i'm wondering is what is the problem in the imac that is causing the issue.    Is this a defect?
Before anyone questions the circuitry in my house here is what I have verified.
An electrician has come and verified the electric panel is good and all circuit breakers are good.   All circuits in my house are copper, no aluminum.
I can plug the iMac into any circuit and the problem starts right when the Imac's display goes to sleep.     I have owned the iMac for approximately 5 months now (bought it used) and the problem started about a month ago.
Assuming this has to be serviced I dread to wonder the price .
Thanks for anyones help.

The sleep timeout has nothing to do with disk activity. It's based on user input, although some background processes can pre-empt it. If you don't want the machine to sleep automatically, disable automatic sleep in the Energy Saver preference pane.

My laptop randomly goes into sleep mode

Similar Messages

Maybe you are looking for