Reboot iMac after being unplugged

Accidentally unplugged my new iMac - now it won't reboot properly.

Hold down the Command+r keys at startup and either use Disk Utility to repair disk or select Reinstall Mac OS X and do an Over the Top Reinstall.

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Imac will not turn back on after being unplugged. Is there something I can do?

imac will not turn back on after being unplugged. Is there something I can do?

SMC RESET
http://support.apple.com/kb/HT3964
Shut down the computer.
Unplug the computer's power cord and ALL peripherals.
Wait 15 seconds.
Attach the computers power cable.
Wait another 5 seconds and press the power button to turn on the computer.
The 5 second timing is important to a successful reset.

My iPad mini adapter shorted...I bought a new one but since it charges very slowly and when charged to 100% it falls to 95% immediately after being unplugged...what might be the issue????

my iPad mini adapter shorted...I bought a new one but since it charges very slowly and when charged to 100% it falls to 95% immediately after being unplugged...what might be the issue????

When it does that. Replug the charger and charge to 100%. Now does is stay charged when you unplug the charger.
You may need to recalibrate your battery.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
How to Calibrate Your Mac, iPhone, or iPad Battery
http://www.macblend.com/how-to-calibrate-your-mac-iphone-or-ipad-battery/
 Cheers, Tom

IMac G4 won't boot up after being unplugged for a week

Last weekend we took our 7-year old iMac temporarily out of service while having some remodeling done. Peripherals were disconnected and everything was packed away safely in boxes.
Today, I tried to set our system back up in the same place, using the same electrical outlets, etc. Everything else (DSL modem, Airport Extreme, deskjet printer) is powering up OK and working just fine. However, the iMac itself will not power up at all -- no chime, no fan sound, screen remains dark -- when the power button is depressed.
The power button does not appear to be stuck, as far as I can see. I've tried disconnecting power for over five minutes, disconnecting the keyboard and mouse and other peripherals, using a different outlet. Still nothing. (I haven't tried using a different power cord because I don't have another one that fits.)
Everything was working fine last week before we took the system down.
Any ideas?

Hey Henry,
Several years ago, someone (cough) managed to strip the head off one of the screws while trying to take off the base panel, and I'm not sure it's possible to get into it without special power tools.
Well you need to get in there to at least press the PMU button.
So depending on how stripped the head is you could use a jeweler's straight slot screw driver. What you're trying to do is to press and rock the tip in the stripped area, which will usually be conical, cutting a new groove into the "cone" to get enough purchase to extract the screw.
I have also used a Dremel type tool to cut a new slot. Using the thinnest cutoff disk I'd grind it down on a piece of scrap steel until the diameter is close to but slightly over the head of the screw. Approach the head of the screw from the outer radial direction and use the reduced disk to cut a new slot in the head of the screw. Then use your straight slot screw driver to extract the screw.
There are miniature "Easy Out" type extraction devices that can also do this job but you can only buy them from special distributors.
The last resort is to drill the screw head with a .073" or larger bit to break the head off the screw shank. The shank is .072" in diameter.
OK so with the bottom off here's the diagnostic for a no power situation from the service manual:
"6. Reset PMU. Refer to “Resetting the PMU on the Logic Board” mentioned earlier in this chapter or Kbase article 95165."
The PMU button is on the opposite side of the RAM slot and towards the bottom under some plastic. Only press it once and have the unit unplugged.
"7. Verify the battery is good before replacing modules. A drained battery may be indicative of a crashed Power Management Unit. Does the battery measure at least +3.5v? If not, replace the battery and reset the PMU. If the battery does measure over +3.5v, reinstall the battery and reset the PMU."
Richard

My computer shuts down after being unplugged

My powerbook G4 sometimes shuts down when I unplug it, even though the battery is fully charged. This seems to happen more often when I unplug it and then pick it up (or put it down). After I restart it, the clock and date have been reset to 1970.
Any ideas of what may be wrong?

Hi c,
Welcome to Apple Discussions.
How long does your PB run on the batt when it does not shut down after removing the power adapter? If a very short time, you may have a nearly dead batt, and the backup batt, even if it is still operational, only lasts a few minutes; once that is dead too, then date and time are reset.
I should have said this first, but just noticed that you said movement seems to cause the issue. That strongly suggests a loose battery. The "fix" can be as simple as wedging a thin piece of rubbery material between the battery compartment and the battery itself, on the side opposite the contacts, to make the contacts remain in contact at all times (earlier models had this issue, but it was supposedly fixed on later models, yet we still hear about it periodically).

HP Pavilion a1123c - will not power on after being unplugged while in use

So bit of panic:
I've been using the above computer since 2007 with the expected wear and tear, slowing down. Today it was put through its paces and while on a multimedia-hwavy web page it became unresponsive to the point I could not even bring up the task manager to restart. Being a computer noob, I unplugged the computer to force a reset. It now will not power on with or without the power source. While plugged in the LED flashes rapidly. When unplugged the LED flashes but more slowly. I have tried flipping the voltage switch on the back but still my computer won't turn on.
I have all of my digital photos on this computer and am terrified of losing everything. What should I do? Is there hope of the data being salvageable? Thank you all so much.

Assuming erico 's advice fixes the situation, please make backups of the important data - such as photos or other important documents to a DVD or flash drive or external hard drive.
If the power supply troubleshooting guide does not fix the problem, there are ways to still make the backups of that important data, on a working computer from the failed computer. Just come back with the report on whether the advice from erico worked or not.
{---------- Please click the "Thumbs Up" to say thanks for helping.
Please click "Accept As Solution" if my help has solved your problem. ----------}
This is a user supported forum. I am a volunteer and I do not work for HP.

Bluetooth adapter issue after being unplugged then plugged back in

I am running 10.7.4, MacBook Pro 2 GHz Intel Core i7, 16 GB Ram, Thunderbolt Display with Apple wired Keyboard and Apple Magic Mouse.
Initial issue:
After using the Magic Mouse for a few months I noticed a significant performance issue with the mouse when the internal hard drive would spin up for large data transfers, Time Machine backups, etc. I spoke with Apple Care and tried a number of things, tried switching the wireless network, all with no sign of a fix in the future. I paired the mouse with other computers and could never re-create the issue. I also paired other Bluetooth mice with the laptop and could not re-create the issue. After doing further research I found a number of people on-line that started to use an external Bluetooth adapter which would bypass the internal one. After purchasing one from Amazon, the results were immediately superior. I had plugged the adapter into the underside of my Apple wired keyboard and performance was as expected.
However, this has led to issue number 2:
My MacBook Pro will travel with me often therefore requiring me to unplug it from my "desktop" setup which is it plugged into a Thunderbolt Display, and the display has all of the peripheral plugged in including the wired keyboard with the external Bluetooth dongle plugged into it. When I have had my computer away form the set up for a few hours/days and then come back to plug it in, all external devices work immediately with the exception of the magic mouse. It will sometimes work fairly quickly, within a minute of plugging into the Thunderbolt display, and sometimes I am unable to make it work at all unless I restart the machine. This issue has happened with and without the Thuderbolt display. Any assistance is greatly appreciated. Thanks!

Never got a green light.. does that mean no light at all.. or is it flashing amber??
The series 1 particularly but it happens in series 2 and 3 the TC power supply breaks. Then if you power down and turn it on again it is dead. No light at all. The power supply was on the edge and after powering off does not have the ability to supply start current to the TC so shuts down.. If you plug in after a while the light my flash briefly and go out.. it will not happen again until you wait a few hours for the caps to discharge.
If you have Apple Care on a computer and the TC is less than 3years old Apple will replace it.. otherwise you are joining a large and ever growing multitude of dead TC owners.
See repair possibilities or repairer list here.
http://sites.google.com/site/lapastenague/a-deconstruction-of-routers-and-modems /apple-time-capsule-repair

MBPro Turns Off Shortly After Being Unplugged

I got my mac August 2006 before my first year of college. Everything has been working pretty well with it except that for the last year or so.
This is my problem:
*When it is plugged in, everything is fine, it charges up to 99%. But when I unplug the power, after 10 minutes or so it just shuts off even though the battery life will say 97%.* This is so frustrating because I can't use it unless I am by an outlet. I know that keeping the MBP plugged in all the time is bad for the battery but I have had no choice. *What could I do to fix this or what is wrong with it?*
AC Power:
System Sleep Timer (Minutes): 14
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 14
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 2
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 5295
Remaining Capacity (mAh): 5254
Amperage (mA): 0
Voltage (mV): 12391
Cycle Count: 26
AC Charger Information:
Connected: Yes
Charging: No
Hardware Configuration:
UPS Installed: No

I FIXED MINE!!!...You see in your profile where it sez..."0-mA"...
mine said the same thing...meaning there's no current getting to the
battery...(I just knew something fishy there). I took my battery out,
and inspected the pins VERY CLOSELY. Looking down at them from above,
each little slot there are TWO pins, one on the left, one on the right.
I took a small safety pin, and GENTLY pulled these pins in the battery
towards the center of each slot...
Essentially you're "helping" it make better contact when the battery is
seated into the machine.
Be careful though...it looked to me like pins could very easily get "pryed
open" too far, and then your battery might not seat at all, or at best, you'll
mash the pins when you put it back in.
I swear to god that's all I did. After round & round, pulling my power plug
only to watch my machine go dead...I kept seeing a good charge on my battery...
ALL green LED's on the battery...etc...calibrating the battery-blah-blah-blah...
It wouldn't even boot with an Apple Hardware disc.
Now I can pull the plug till my face is blue & it's like the energizer bunny!
The PINS my friend...the pins!

After I unplug headphones, the speakers no longer work until rebooted. Anyone else experience this? Also had the same issue on the Droid Razr Maxx.

After I unplug headphones, the speakers no longer work until rebooted. Anyone else experience this? Also had the same issue on the Droid Razr Maxx.

Ahh. We can still help find the culprit, TeaParty14. Do you have any 3rd party applications installed to play your music? Are you able to hear any audio if you plug the headphones back into the phone instead of rebooting? Any audio for calls through the phone direct or through speakerphone?
JenniferH_VZW
Follow us on Twitter www.twitter.com/vzwsupport

I have an email account causes the machine to hang up after being in use for a day. It only occurs on my Macbook Pro and only one particular account. The problem account works fine on my iMac and Windows Machines. Any ideas what is causing this?

I have an email account causes the machine to hang up after being in use for a day. It only occurs on my Macbook Pro and only one particular account. The problem account works fine on my iMac and Windows Machines. I have been to the local Genius bar and through trial and error we have determined that Mail is working ok but somehow the account is causing the problem. I have used this account for years. Any ideas what is causing this?

No idea why, but one thing you may try if you have the time, is create a new user, and set up the problem mail account in the new user space. See if it causes your MBP to hang as well. That will tell you if it is something wrong with your main User, or something wrong with MBP.
Assuming this works, I'd nuke the problem account in your main user space, re-start, and reinititate the account and see if that helps.
Depening on how many email accounts you have setup, it may be necessary to nuke the whole Mail folder in your User/Library.... Hard way to get it to work, but just my idea.

I get a blank word document opening every time i reboot my iMac after upgrading to OS Lion.

I get a blank word document opening every time i reboot my iMac after upgrading to OS Lion. ANy ideas how to get rid of it? I have uncheked everything in mu users and groups and unchecked restore windows in the general file.

When you logout did you uncheck the Reopen windows when logging back in check box at the bottom of the logout window.

After being away for two weeks my iMac wont send my Orange mail.

After being away on holiday for two weeks my iMac wont send my Orange mail. I get the message "The server “smtp.wanadoo.co.uk” refused to allow a connection on the default ports."
I have not changed any setting, the email sends if I login to Webmail, so the account itself is valid. The iMac mail downloads my email perfectly as normal. Using Mac OS X 10.6.8. Email address is one I have used for almost 10 years without any problems.
It is a POP3 account using default ports with no authentication or SSL. Have tried different ports (e.g. 26), putting password authentication on, but nothing works.
Any ideas?

Fixed it. Played about with the port numbers and got a more detailed message:
Client host blocked for spamming issues. OUK104_102 Ref http://csi.cloudmark.com/reset-request/?ip=nn.nn.nn.n. Select a different outgoing mail server from the list below or click Try Later to leave the message in your Outbox until it can be sent.
Went to Cloudmark and got the IP reset. Took an evening of work but worth it.

IMac G5 (1.8 Ghz) Shuts down after being put to sleep

My G5 shuts down immediately after being put to sleep and shortly after falling into sleep mode automatically. I have reset the SMU to no avail. I have also reset the Energy Saver preferences to the default setting.I didn't have this problem prior to installing OS 10.4.11. Any suggestions?

To The Apple Discussion Boards!
Have you tried repairing permissions & restarting either from the Utility Menu or your Tiger Install DVD?
See if your computer qualifies for the G5 iMac Repair Programs
**WARNING: DUE TO SECURITY REASONS, PLEASE DO NOT POST YOUR COMPUTER'S SERIAL NUMBER ON THESE MESSAGE BOARDS.**

Why is my 2011 imac getting really hot after being repaired twice?

My 27in 2011 Lion Imac is being wierd. I have always noticed that the Hard drive or fan would not turn off when put to sleep. Even when I would get up in the morning, it would still be on. The first time we got it repaired was when the computer would just crash, and eventually not even start up! We went to a local Mac dealer who also did repairs. They said that the circut board was totally burn out, and that they had replaced the power supply. We got home, and all was well untill two days later it just froze. We restarted it and kept on pushing but soon it was either freezing or a gray screen would roll down and say it has to be restarted. It also got so hot, that we could smell something burning. So we brought it back. This time they said that the directory was totally corrupted! So today we brought it home and all seems to be fine, although it seems to still be getting really hot after only an hour of use. When I listen cloesly to the machine it sounds like an electrical buzz. The buzz did fluxuate with the computer doing different tasks, so it could just be the preccessor or something. This is getting very annoying.
Are there any experts or people that have had similar problems and what they did to fix them? Thanks...
I have never had a Mac act this way.

If your iMac is still under AppleCare warranty, backup everything on your iMac, bring it back either to Apple or the repair center and kindly, but very, very strongly ask for a replacement iMac.
Your iMac has just got too many issues and components that failed.
Under AppleCare, you can ask for a one-time complete replacement.

ITunes Shutsdown my iMac after aprox an hour

Hey!
Since 7.0 iTunes has had a nasty habit of shutting down my iMac after aprox an hour of playing on AirTunes without the mac being used for other purposes. Highly annoying
The music stops in the middle of a track and the mac is "unwakeable" - it responds to "enter" by rebooting after a looooong while with a black screen.
Has anyone experienced the same issue?
Best regards from Copenhagen.
Peter

Hi there
7.0.2 has been installet and it makes no difference.
My AirTunes is off at down moment (along whit my internet) and the shutdown occurs when I play on the iMac's internal spaekers as well.
Best regards Peter

Reboot iMac after being unplugged

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