IMac Intel :: Unable To Turn On System / Had Soft Power Down Last Night

Feb 15, 2009

I just bought my Intel-based iMac last night and it took forever to turn on out of the box. I guess I made a mistake by doing a "soft" power down last night, because this morning it will NOT turn on. I've tried using the power button and waiting. I've tried unplugging and plugging it back in, and then using the power button, and waiting. Nothing works. I've been a PC user for 20 years and just bought this, my first Mac, last night. I think I've made a huge mistake! How the heck do you turn these things on????

iMac Intel Based
Mac OS X (10.6.4)

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IMac Intel :: Unable To Turn On System / Shut Itself Down And Refused To Power Back Up

Jun 19, 2008

I have a 20" intel-based dual core Mac which i have had for about since early 2006, i haven't had any big issues with it until a few days ago when it suddenly shut itself down and refused to power back up. I ran through the checklist that Apple Support provides, including resetting the SMC by unplugging everything and waiting 15 seconds or so but none of it worked. Eventually I just left the power cord unplugged overnight and in the morning I plugged it back in.

After having the power cord plugged in for a few hours and the machine turned off, i tried pressing the power button again and to my amazement it powered back on! Immediately i ran the TechTool Deluxe software that came with my extended protection plan (now expired) and everything was fine. Later that night however, I had left my computer on for a few hours before returning to it and realizing it had shut itself off again. Now I am back to where I started, going through the checklist provided by Apple and am really starting to get concerned. Does anyone know of anything else I can do, short of taking it in to an Apple store? Or is something needed to be replaced?

IMAC-Intel (Early 2006)
Mac OS X (10.4.11)

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IMac Intel :: Unable To Turn On System / General Power Was Turned Off For Some Minutes`

Jul 1, 2009

my iMac won't turn on. The day before yesterday happened the same thing, but after a few tries with the power button, it eventually turned on - and all ok yesterday. Both the day before yesterday and today, the general power was turned off for some minutes, but the iMac wasn't running. So now, I've tried to reset the SMC, removing everything attached, but nothing.

At least I can clearly hear the tic tic tic button, probably of the timer, because I set up a schedule to let it turn on at a certain hour. What can I do? It's a white iMac, never had a problem.

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IMac Intel :: Unable To Turn On System / No Fans Start Up And The Screen Does Nothing

Jan 25, 2007

My parents recently bought an iMac. Yesterday my mom was playing a game when the computer froze. Neither force quit or holding the power button was doing anything so in her frustration she unplugged the system. Today, after plugging in the system again, it won't turn on.

I press the power button on the side of the wireless keyboard and the green light on the keyboard turns on for about 3 sec and then starts flashing. No fans start up and the screen does nothing.

iMac and Macbook Pro
Mac OS X (10.6.3)

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IMac Intel :: Unable To Turn On System / Changed Access Settings Of Some Files

Apr 3, 2009

My girlfriend changed the user's name and the problems started (iMac wouldn't remeber system settings and denied access to some files and catalogs). When I wanted to fix the problem I probably made a mistake and changed the access settings of some files (finally even hard disk's settings). After this action my iMac doesn't start (the screen is white with the apple logo and nothing happens). Is there anybody who knows what to do now?

Mac OS X (10.6.3)

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MacBook Pro :: Cannot Turn On After A Damp Night

May 27, 2012

I left my mbp next to an open window on a very damp night after a few very damp days. In the monring it would not start after I pressed the power button, and the magsafe connector appeared to be dead, there was no light of any color. I used another magsafe whose light did turn on, and left it all plugged in overnight. In the morning it all turned on as if nothing had happened, and my magsafe appeared to be working fine. I had everything back up, and was lucky to be in town, but what do I do now to trouble shoot and make sure this doesn't happen again?

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IMac :: Intel-Based Unable To Power On - How To Fix It

Apr 19, 2009

I have a 17 Inch Intel-based IMac (2006). when I press the power button I can here and feel fans running but the Power Indicator Light turns on and the screen remains black. Nothing else happens. Not sure what I did. I didn't take anything apart. I checked over the whole compartment and all connectors appear to still be connected.

I did some research figured out how to disassemble the IMac, purchased a new hard drive, backed up the computer and when I took it all apart there was a third connector on the hard drive (temp sensor?). The new drive did not have this connector so instead of experimenting I put the computer all back together.

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IMac Intel :: System Instantly Shut Down / Not Delivering Power To USB Devices

Oct 31, 2007

Just recently (this night,) whenever I would unplug my main USB hub, my iMac (Late 2006) would turn off (that is, instantly shut down as if the power had been disconnected). I don't know why this happened, but it turned on immediately afterward so I shrugged it off. The last time this happened, (the 4th time,) the iMac wouldn't turn back on at all.

It responds to power button presses, and you can hear the harddrive spinning up and the CD drive whirring and fans spinning. The sleep light in front stays on, but the display stays black, and it doesn't make the characteristic chime when it "turns on". In addition, it doesn't seem to be delivering power to USB devices, so there's no way that I can boot up from a startup disc or anything to see what's going on.

What do you guys think could be wrong with my computer? I doubt my non-existant applecare would cover anything of this sort, and I'm pretty sure that i'm SOL for hopes of a computer that just works. In addition, one other question. I was working on a VERY important school assignment at the time, (cliche, I know,) so is there any way I can connect another computer to my iMac so I can get my school assignment off of it?

G5 Intel iMac (Late 2006)
Mac OS X (10.6.4)

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IMac :: Turn On The Power Without Pressing The Power From Button?

Mar 21, 2009

i just got my new imac 2 days ago. I was wondering is there another to turn on the power without pressing the power from button? (cuz i remember u can power on from the keyboard b4)

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Power Mac :: No Power, Unable To Turn On?

Feb 19, 2012

Older Power Mac G5 Dual Quad will not turn on. Just turned off while working. Good news everything backed up. Can anyone offer help to solve problem??


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Mac Pro :: Power Supply Not Working / System Shut Down Suddenly And Would Not Turn On

Jul 1, 2010

I tried the "search" box before making this thread. Would like to know if the power supply from a 2008 MacPro work on a 2006 MacPro. If anyone has tried this? My 2006 MacPro shut down suddenly and would not turn on. I use an APC UPS plugged on a power surge outlet. The Mac technician who examined the unit suspected it might be the power supply but Apple may not have in stock the power supply for the Ist Gen MacPro.

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OS X V10.7 Lion :: Shutting Down At Night - What About Those Maintenance Procedures That Run At Night

Apr 14, 2012

I have been shutting down my MacBook Pro OS X10.7.3 at night.I just read that OSX runs "maintenance" procedures early in the morning (between 3:15 am and 5:30 am) and that if Mac is powered off at that time, that these maintenance procedures will NOT run.True or False?  AppleCare says that it won't make any difference and I won't be affected if these night procedures never run.  But, if that's true, then why are they set up to run at night? ? I went to the Apple Manual but it does not address my question. 

Mac OS X (10.7)

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MacBook Pro :: Unable To Power Up / Computer Suddenly Turn Off

Aug 20, 2014

my Macbook Pro is not powering up, Yesterday I connected a camera that has the USB cable with the little transformer. And the Computer suddenly turn off!  It´s not working at all... I really don´t know what happened..These are some of the characteristics of the problem: 

1) Not even the battery Light its on when I press the Power button.

2) Not even the Light in front of the Mac is on when I press the Power button.

3) There is not even a sound of the cooler fan or anything.

4) When I connect a the power cable the first 10 seconds the light of the cable is off... Then it appears a little "Orange intermittent" light but nothing more happens. 

MacBook Pro, iOS 7.1

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PowerPC :: Unable To Turn On PowerBook / Using Power Adaptor Glows A Bright Orange

Mar 8, 2007

I just aquired a PowerBook G4 (500Mhz) and it is dead. It will not turn on no matter what I try and when I plug in the power adaptor it glows a bright orange (almost red)...what does that mean?

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Intel Mac :: Won't Turn On SMC Or Power Pack?

Apr 13, 2012

Using my iMac today working away and all of a sudden the screen went black, there was no power to the computer at all. I have checked the fuse and that is ok. I am getting power to everything else. I reset the SMC as per Apple instructions on their website. Again nothing. 

I then left it turned off for a good 5 mins and then turned on the power. The fans turned on and the mac then chimed, the creen came on and I thought everything was ok. Then the computer turned off, fans and hard drive sped It didnt even start booting to the Apple logo or the log on screen. 

I am thinking this is a power issue within the computer and this will need to be replaced. I was wondering if anyone else has had this problem. My iMac is a 2008 21inch iMac. It is connected to a APC UPS which again all power ports are working, as I have tested that with a desk lamp. What I do normally is turn the UPS when I have shutdown my Mac in the evening and then power it up next day. While the UPS is doing is power self test I then boot the Mac, I am wondering if I should just leave the UPS turned on all the time and just unplug my iMac when I am not using it. Sometimes I do pop it to sleep last thing at night, but recently I just turn it off.  

It has had heavy use so I am wondering if it is indeed curtains and I need to buy a new iMac. Maybe it is an excuse to buy a 27inch one! (Would be nice) 

iMac, Mac OS X (10.7.2)

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IMac :: 24" Won't Turn On After Power Failure

Aug 6, 2010

I left my iMac on overnight last night to finish downloading some stuff. I woke up and all our clocks are flashing, so we must've had a blackout. Anyway, I went to check the progress of my downloads, and the iMac was off. I pushed the power button and nothing happened. No fan noise, HDD noise, nothing. I've been trying for almost two hours now and nothing is working.

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IMac PPC :: Power Outage G5 Was In Sleep, Now Won't Turn On

May 25, 2012

my G5 was in sleep mode during 2 power outages. She will not turn back on, have tried unplgging, wait then replugging and turning powerstrip back on. Also tried holding down command,option, p & r keys along w/ powerbutton..I'm on my kindle fire rt now,  but definitely need my Mac back up.

iMac, Mac OS X (10.4)

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IMac :: 27" Power Button Needs Pressure To Turn On?

Nov 30, 2009

Just got a replacement imac 27 stock C2D yesterday for a defective one I had earlier, however, I couldn't get this new one to turn on till just a few hours ago. I just figured out the power button needs quite of bit of pressure to turn on. Seemingly just pressing it until it clicks isn't enough. Should this be looked at or is this normal?

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Intel Mac :: Cannot Turn On Dual Core After Power Failure

Mar 15, 2012

Cannot turn on iMac duo core after power failure. Tried plug - unplug. What's next?

iMac 2 GHz Intel Core Duo, Mac OS X (10.4.9)

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Intel Mac :: It Doesn't Turn On, Just Power Light Blinks

Jun 21, 2012

My imac does not turn on, not even make the noise when booting up. The only sign of life is the blinking light that tells you is on.

iMac, iOS 5.1

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IMac :: Unable To Open IMac Memory Cover - The Screw Won't Turn.

Oct 25, 2009

I don't know what the deal is. I'm trying to install 2 sticks of 2GB into my 7,1 iMac, and the screw just won't turn. I'm using a standard Phillips head, and nothin' doin'. The screw is now starting to strip, so I guess I'm going to have to take this into the friggin' Apple Store just to have them open the thing.

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IMac :: Safe To Keep On Whole Night?

Apr 3, 2009

I ordered an 24" iMac with 2.93 GHz (I think thats the number) and I am supposed to get it today. Anyways. I was wondering if it is safe to keep it on all night and never turn it off. Will it become slower? When should I shut it off?

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Intel Mac :: Why Does It Wake Up At Night By Itself

Mar 15, 2012

I have noticed my iMac waking up in the middle of the night when it's sleeping. It's not real loud or anything, but I am a light sleeper and it wakes me up, sort of like a  Twighlight Zone episode. Does anyone else notice this? Could it be spywre?

iMac, Mac OS X (10.6.8), Update keeps installing old software

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Intel Mac :: Unable To Turn It On

Jun 9, 2012

My iMac turned off by itself.Now the power button is inoperative.

Info:iMac, Mac OS X (10.6.8)

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PowerPC :: G4 Power Mac Won't Install OS X - System Unable To Recognize The Disc?

Sep 22, 2007

I just got a Power Mac g4 from my school and i dont know much about it but it didn't come with an operating system. I bought a full retail version of mac os x and pop the disk in and it will only eject the disk. I tried holding option when its installing but the computer wont recoginize the disk it will only eject it.

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Intel Mac :: Mac Wakes Itself From Sleep Every Night At 9:57?

Apr 27, 2012

My mac wakes itself from sleep every night at 9:57.  What have I set to make that happen?

Mac Pro

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OS X :: IMac Waking From Sleep During Night - Is It Normal

Dec 19, 2009

Newbie here, It has just come to my attention that my 27" iMac wakes up during the night. It is always put to sleep at night rather than turned off. My parents are staying for the weekend & sleeping in the same room as the imac, & mentioned this morning that screen turned on a couple of times during the night. I looked at the time machine back ups & found it had made 2 during the night.

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IMac :: Power Pc System Recommendations

May 31, 2010

I am brand new mac user, never used it before, I just got an older iMac and want to learn about it. I need help to know what's the newest system that can be installed on it.

its 500 MHZ power pc processor
30 GB Hard drive
512 Ram

I want the newest possible system so I can start on a newer system espicially since i am still a starter. Another question I have, do i have to purchase a cd to install a system or is it possible to download it from the internet?

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IMac :: Power Outage Now System Dead?

Mar 30, 2010

I put my i5 to sleep around midday, came home from work @ 4, and my iMac would not respond to keyboard, mouse, or power button mashing. My wife noted the power had gone out upon seeing the microwave clock. I checked the outlet (her Macbook was plugged into the other receptacle), and there's still power going to my machine.

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IMac :: Can I Reset Power Saver Settings In A System

Jul 28, 2009

I have this iMac for slightly over two years and when I forst got it I thought it would be a good idea to have it start up a 6:55am each weeday. After about a week I changed my mind and went back into Power Saver and turned off the settings. Since then, I can't tget the machine to quit auto-starting at 6:55, 7:55 and even sometime 8:55. I have called Apple, taken it in to an Apple store, they even claim to have replaced the computer

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