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.

Information:
iMac and Macbook Pro
Mac OS X (10.6.3)

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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????

Information:
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?

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

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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?

Information:
iMac
Mac OS X (10.6.3)

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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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PowerPC :: IMac G5 17" Won't Start - Grey Screen And Noise Of Fans

Jul 3, 2009

My Mum has just turned on our family computer- an iMac G5, 1.9ghz 17" (first model with built in iSight).

It gets to the grey screen with the apple, with the loading icon below it, then after about a minute the fans turn out pretty loudly, and it goes no further, just stays on the grey screen.

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OS X Mavericks :: IMac Start Up With Apple Logo And Sound But Then Screen Turn Off

Jun 2, 2014

This situation began when I put my Imac on sleep. After, the screen turned on in black whit the cursor but I couldn't do anything.

Then to rebooted the machine, the apple logo and sound  began fine but the screen turned off, so moving the mouse the screen turned on in black with cursor. 

I'd tried many ways, resetting the PRAM, SMC, repairing the disk and permission, analyzing hardware, repairing fsck files.

Suddenly, when I entered in Verbose mode, mi imac brought into user choose screen and worked fine, but when I shut down and tried to start my mac in the next day, it didn´t work again. 

Info:
iMac, OS X Mavericks (10.9.3)

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Intel Mac :: How To Turn On Fans To Keep It From Overheating

Jun 12, 2012

How do I turn on the fans on my iMac to keep it from overheating? I used to be able to turn them on when I plugged in the computer and turned the computer on simultaneously but that stopped working.

Info:
iMac (20-inch Late 2006), Mac OS X (10.6.4)

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Software :: Unable To Start System / Gray Screen Fades Into White And Apple Logo Never Appears

Mar 19, 2009

I have had my MacBook for almost two years and the battery had just died on me. So I sent it back to Apple and got a new one. But ever since switching over to this new battery, my computer has had issues starting up. A grey screen fades into white and the Apple logo never appears. The computer will just stay like that for hours. A friend suggested turning the power off and back on, holding apple+ctrl+P+R, which worked. However, the next time I turned my computer on, the screen stayed white again, without an Apple logo. Can you tell me what the deal is? Should I bother reporting this to Apple? Is this permanent damage I'm going to have to go thru everytime I start me laptop? Any way to fix it? Thanks.

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IMac (Intel) :: G5 / Intel OS 10.6 System Does Not Start Up After Connecting New Router

Jun 28, 2014

After connecting the imac to a new router the system hung completely up. After each input, e.g. opening preview or a browser, the coloured turning disc appeared and nothing happened anymore. Several restarts, also in safe mode,  were unsuccessful. I could not switch to another user.  Restart is only possible at all from installation disc but thereafter problem remains the same.

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IMac PPC :: G5 Desktop Won't Start And Fans Don't Run

Apr 3, 2012

I'm trying to fix a friend's G5 desktop, 1st generation. 1st LED comes on, 2nd LED comes on when I press start button. Power supply voltages are correct. Hard drive runs, but fans don't come on. I have power to fans. 5 and 12 volts. No beeps. Pressed SMU button as well, and nothing changes. Don't see any bulging caps. Someone else changed a few before I got it. Also jiggled RAM chips.

Info:
iMac

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Intel Mac :: Unable To Start G5 Stuck On Grey Screen

May 8, 2012

Turn on Mac goes to grey apple screen cog wheels spins but its stuck there tried control option p and r doesn't do anything tried turning it on while holding shift key to try and get it in safe mode but that does not work either.

Info:
iMac, Mac OS X (10.4.11)

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IMac (Intel) :: Red Screen On Start Up

Jun 3, 2014

my new imac has recently been displaying a red screen for a split second on startup, does this indicate a problem or not. I'ts my first mac so I know very little about it being a regular pc user.

Info:
iMac, OS X Mavericks (10.9.3)

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PowerPC :: Unable To Start System After Update / File System Got Corrupted?

Jul 19, 2007

I am a proud owner of a MAC powerbook G4 for just over 3 years now. It runs MAc OX 10.3. For the last two weeks i have been having issues. First it started to be very slow. Then it would not boot up and i got a blue screen. I ran the file system checks from the OS X and it complained about the volume being bad and said it could not be repaired. i decided to reinstall the whole thing and did a complete erase and install. IT booted up fine. The software updater asked permission to update which i agreed.

After the update was over, the software updater had more updates. I guessed that it was probably giving me updates in the chronological order. During a particular update, it gave the blue screen and "please restart" ... and when i rebooted it did not come up... just a blue screen... i verified the filesystem using the diagnostic tool and it again said it was corrupt .... I have done this twice now and i have a feeling it happened when i was updating the same batch of software updates.... sometimes my software updater would crash everytime i launch it.....

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Sep 1, 2014

iMac start up... Why my imac start with question mark sign on gray screen

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IMac (Intel) :: Does Not Start / Mouse Freezes In The Left Corner Of Screen

Sep 4, 2014

My Mac does not start, the mouse freezes in the left corner of my screen and displays a block break?

Info:
iMac, OS X Mavericks (10.9.1)

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IMac (Intel) :: Screen Flashes Pink With Yellow Apple Just After Start Up

Jun 1, 2014

My screen will flash pink with a yellow apple icon just after the spinning gears has stopped when I start up.

Info:
iMac, OS X Mavericks (10.9.3)

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Jun 25, 2014

My iMac doesn't come up after turning the power on,the logo keeps running but it doesn't  start or open the screen.

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MacBook Pro :: Appears To Turn On But Sleep Light Remains On And No Start Up Screen?

Jul 18, 2010

This morning, I synced my iPod with my MacBook and upon completion and permission to disconnect the device, I pulled out the USB cord. At that point the computer instantly turned itself off, and when I hit the power button, I could hear the system trying to start up, but the screen remained black and the sleep light glowed continuously. I unplugged the charger, took out the battery and put it back in, and tried all the troubleshooting tips under the Apple Support guide with no success. I also discovered that when I closed the laptop while it was "on," it would seem to boot up a little more before returning to the black screen. I left it alone for a few hours, and when I tried again to turn it on, it booted up normally and as I was searching for updates, it shut down again as it had earlier.

Does anyone have anything for me to try? I don't want to have to take it into a shop because I can just barely afford to, but I need this computer! Any suggestions would be greatly appreciated :-)

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IMac (Intel) :: System Administrator Is Using ICloud Password To Log In And Unlock Screen

Dec 4, 2014

In my User & Groups, it shows that a System Administrator with standard access is the current user for my iMac.A "System Administrator" is using an iCloud password to log in and unlock the screen. I cannot delete the user, nor change their password.I am running OS X Yosemite 10.10.1I purchased the iMac from a school closing auction.I know little of apple computers - be gentle.

I want to remove the "System Administrator" who recently appeared (within the last few days).How do I make my computer more secure? (I changed my iTunes password already.)

Info:
iMac, OS X Yosemite (10.10.1)

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May 3, 2012

System will not start. I now have OS Lion. I can not use the start up disks as adviced by others. My start up disk is OS Snow Leopard. I installed OS Lion. What do I do now?

The Snow Leopard start up disks tells me "Mac OS X cannot start up from this disk."

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Intel Mac :: How To Turn Off Programs That Start Up Automatically On Bootup

May 25, 2012

How do I turn off programs that automatically start up when I turn on the computer? I want to improve the processing speed of my system and I'm pretty sure programs running in the background are slowing me down.

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Unable To Restart Intel Based IMac / Can't Get Past Grey Screen

Mar 19, 2012

I shut down my imac and when I went to restart it, I can't get it to get past the grey screen.I can't even get to the apple screen.I have unplugged everything and nothing works.

Info:
iMac, Mac OS X (10.7.3)

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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 :: How To Turn Off IMac Screen But Leave Secondary Screen On?

Dec 21, 2009

I'm sure this should be simple but I can't figure it out.

I have my iMac connected to my TV and am using Plex to watch stuff on the TV.

What I'd like to do is turn my imac screen off without turning off the second monitor output (i.e. tv) as the imac screen is a bit bright/distracting (even on lowest brightness) when watching in the dark.

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IMac (Intel) :: Installed SSD / Constant Fans / No HDD Temp Sensor

Dec 10, 2014

I've recently installed a Crucial M500 512 GB SSD into my 21.5" 2011 iMac. I've done this to quite a few iMacs, and am well aware that some have a temperature sensor on the factory-installed hard drive. This one, however, did not, and now that the SSD is installed, I'm getting constantly running fans. 

The fans run whether it's booted from the internal SSD, an external FireWire HD, or even if it's sitting in Target Disk Mode or on the Boot Options screen, so I feel like it's hardware-related. 

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PowerPC :: Change The Hard Drive - When Turn On The System Nothing Comes On The Screen?

Mar 22, 2009

we changed the hard drive in my friends G3 800 but now when you turn it on nothing comes up on the screen. It will act like it starting up, read the cd a little than sit idle.

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MacBook :: Unable To Turn On After Screen Replacement

Oct 20, 2010

i just replaced the macbook screen as mine was cracked macbook was working with external display perfectly, i should mention i am not a novice have replaced screens on several macs for friends and family never had a problem, but i have no idea whats going on with my own at the moment i have triple checked the connectors all

macbook turns on screen flashes for half a sec and then nothing i can hear the hard drive moving, front led comes on, the optical drives makes a sound as

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MacBook :: CPU Fans Don't Turn On?

Nov 11, 2009

I have a late 2009 Macbook Unibody that get extremely hot. From using SMCFanControl it tells me it's at 80-90 degrees celcius which to me is extremely hot. The fans also do not kick in at all when it gets at this level. When using skype, it skyrockets over 100 degrees celcius which causes my computer to slow down.

Is anyone else having this issue? Do you think it's a hardware malfunction?

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Mar 18, 2007

Is it possible to make the imac g5 lcd screen into a normal lcd screen that connects to a normal computer through something like VGA?

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