Advice needed on white imac 24" screen - black levels

Hi, I'm new to these forums as I'm a new mac user. So far the experience has been pretty good!
I have a white 24" imac, and the colours and black levels look pretty ok in a normally lit room.
However when I turn the lights off (room is in the dark) and view say a black screensaver, the whole screen appears greyish rather than a pure black. The greys appear quite even though, no splotches or anything.
Is this something I should expect, especially for the iMac screen which is known to be an IPS lcd panel? Or should I give apply a call about it?
Any advice and help would be greatly appreciated, thanks!

More than likely that is caused by the backlight and is normal.

Similar Messages

Strange restart screen happening and advice needed on new imac purchase

Well first thing first, i just sold my imac 20" CD for a refurbished 24" iMac C2D directly from apple. The first thing i noticed is screen during the restart process that i have never seen on the multiple macs that i have owned. It looks like terminal/ms-dos with a black screen and lines of white text that indicate what is going on in the restart process. it doesnt really affect anything, i just don't really like it showing up, i would rather have the grey apple with spinning marks under it. Is this a setting somewhere that i don't know about?
And for the second thing. Because of this black screen that happens during start up i noticed.....a green stuck pixel... I am pretty picky about my things and when i noticed this i started freaking out a little bit. I know that stuck pixels are very common in LCD's i just didnt really want one in mine. I tried massaging it and all of the programs out there that are supposed to "un stick" it with no luck. I know apple is not likely to replace a unit for a single stuck pixel but i was going to try my hardest to get it replaced until......i looked in the system information and noticed that i somehow got the upgraded gforce 7600 256mb video card. So my question is should i stop complaining and take the $125 video card upgrade for free or try and get my unit replaced for my stuck pixel. BTW, the stuck pixel is only viewable on black/really dark screens and it is located in the middle display, about 2 inches right. Thanks in advance

A very tough question to answer. I am a little picky also and a stuck pixel would drive me up a wall. But have you tried to reinstall the system to see if it fixes the weird startup. Weighing the video card against the pixel I would have to go with seeing if apple could fix or repair the screen without switching the machine. If it is still under warranty they will try to no end to repair it before they just send you out another unit.
So I guess my answer is to make them repair the system thus saving you your video card.

My imac's screen blacks out during booting

MY imac froze and restarted recently, then when i got into the computer it froze and shutoff again. This time when i tried to turn it does one of a few things... 1 it only gets to the Apple logo then blacks out, 2 it goes to the place i requested by key commands, or 3 it has the Apple logo, then a loading bar that only loads for about a second and only reaches a very very small fraction of full capacity, then lastly goes to a spinning loading wheel that lasts 5 seconds at most then it blacks out once again.

We do not know which iMac or what OS X your on, but that sounds like a hardware problem.
Run the Apple Hardware Test, as per > Using Apple Hardware Test and report the results either here or to your local Authorized Service Provider.

24" iMac aluminium screen black? can here computer is running but screen is totally...dead, black... can even see on my other imac that it is visible on bluetooth... however, sharing is not turned on on blacked out imac? Help please.

I can hear the computer is running, sounds normal. I can even pick it up on my other mac via blue-tooth. However sharing is not turned on blacked out iMac so can't even access it through my working

I can hear the computer is running, sounds normal. I can even pick it up on my other mac via blue-tooth. However sharing is not turned on blacked out iMac so can't even access it through my working

Why is half my iMac desktop screen black?

Just in the last few days my screen has been going grey, and now black. Half the screen is now black, and it's on the right hand side of screen. I've also been getting the spinning rainbow wheel, but thought I may have cured the spinning wheel issue when I contacted Apple, in February 2012, and purchased a Ram upgrade to a total of 4G, and OS X Snow Leopard, and then OS X Lion. Still get the spinning wheel a bit, and had some difficulty downloading some software upgrades. Tried the upgrades again yesterday...6 of them, and apparently the successfully downloaded.

It is most likely the backlight. If you are still covered with warranty or AppleCare take it in ASAP if not contact customer support and see what they will do for you. Work up the food chain to at least a supervisor

IMac late 2009, screen blacks out running Yosemite 10.10.2

My iMac's screen blacks out for no apparent reason, and the computer is still running normally. But I can't see it.
I thought temperatures were to blame, resetted fans with Macs fan control to speeds, where everything is nice and cool, the problem persists.
The screen might black out, for no apparent reason while working, or when idle. Trying to restart manually, it might black out while in the login screen, or even the apple logo. Or it might even restart normally and work for 8 hours. I have been trying to leave login items out, even Macs fan control an iStats, and the problem remains.
If I clear PRAM while rebooting, I might get a new lease of working life, but not persistently.
The problem started around two months AFTER I installed yosemite and with no new programs installed at the time.
Please Help.

And an Etrecheck
Problem description:
iMac screen blacks out in yosemite
EtreCheck version: 2.1.8 (121)
Report generated 1April, 2015 at 15:20:46 GMT+3
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    iMac (27-inch, Late 2009) (Technical Specifications)
    iMac - model: iMac10,1
    1 3.06 GHz Intel Core 2 Duo CPU: 2-core
    8 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 0/DIMM1
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM1
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    ATI Radeon HD 4850 - VRAM: 512 MB
        iMac 2560 x 1440
System Software: ℹ️
    OS X 10.10.2 (14C1514) - Time since boot: 1:12:55
Disk Information: ℹ️
    Hitachi HDE721010SLA330 disk0 : (1 TB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 999.21 GB (554.08 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
    OPTIARC DVD RW AD-5680H
USB Information: ℹ️
    Logitech USB Receiver
    Apple Inc. Built-in iSight
    Generic USB Storage
    Apple Internal Memory Card Reader
    Microsoft Wired Keyboard 600
    Apple Computer, Inc. IR Receiver
    Apple Inc. BRCM2046 Hub
        Apple Inc. Bluetooth USB Host Controller
Gatekeeper: ℹ️
    Anywhere
Kernel Extensions: ℹ️
        /Library/Application Support/Avast/components/fileshield/unsigned
    [loaded]    com.avast.AvastFileShield (2.1.0 - SDK 10.10) [Click for support]
        /Library/Application Support/Avast/components/proxy/unsigned
    [loaded]    com.avast.PacketForwarder (2.0 - SDK 10.10) [Click for support]
        /Library/Extensions
    [loaded]    com.driver.LogJoystick (2.0 - SDK 10.9) [Click for support]
    [loaded]    com.logitech.driver.LogiGamingMouseFilter (1 - SDK 10.8) [Click for support]
        /Users/[redacted]/Library/Services/ToastIt.service/Contents/MacOS
    [not loaded]    com.roxio.TDIXController (2.0) [Click for support]
Startup Items: ℹ️
    TuxeraNTFSUnmountHelper: Path: /Library/StartupItems/TuxeraNTFSUnmountHelper
    Startup items are obsolete in OS X Yosemite
Launch Agents: ℹ️
    [not loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [running]    com.avast.update-agent.plist [Click for support]
    [loaded]    com.avast.userinit.plist [Click for support]
    [running]    com.bjango.istatmenusagent.plist [Click for support]
    [running]    com.bjango.istatmenusnotifications.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [loaded]    com.avast.init.plist [Click for support]
    [loaded]    com.avast.uninstall.plist [Click for support]
    [loaded]    com.avast.update.plist [Click for support]
    [running]    com.bjango.istatmenusdaemon.plist [Click for support]
    [running]    com.bombich.ccchelper.plist [Click for support]
    [loaded]    com.torch.update.agent.plist [Click for support]
    [loaded]    net.freemacsoft.LiteIcon.LIHelperTool.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]
    [loaded]    com.avast.home.userinit.plist [Click for support]
    [loaded]    com.google.keystone.agent.plist [Click for support]
    [failed]    com.jdibackup.ZipCloud.autostart.plist [Click for support]
    [loaded]    com.jdibackup.ZipCloud.backupstart.plist [Click for support]
    [failed]    com.jdibackup.ZipCloud.notify.plist [Click for support]
User Login Items: ℹ️
    Macs Fan Control    Application (/Applications/Macs Fan Control.app)
    Dropbox    Application (/Applications/Dropbox.app)
    Logitech Gaming Software    Application Hidden (/Applications/Logitech/Logitech Gaming Software.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 17.0.0.134 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Unity Web Player: Version: UnityPlayer version 4.6.1f1 - SDK 10.6 [Click for support]
    Silverlight: Version: 5.1.30514.0 - SDK 10.6 [Click for support]
    JavaAppletPlugin: Version: 15.0.0 - SDK 10.10 Check version
User internet Plug-ins: ℹ️
    RealPlayer Plugin: Version: Unknown [Click for support]
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
Safari Extensions: ℹ️
    AllMyTube
    GMail Counter
    SPOI Options
    Ultimate Status Bar
    SuperDrag
    Stop/Reload Button
    AdBlock
    YoutubeWide
    Magic Scroll
    ZoomBySite
    AllPagesZoom
    ClickToFlash
Audio Plug-ins: ℹ️
    DVCPROHDAudio: Version: 1.3.2
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Perian [Click for support]
    Tuxera NTFS [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         9%    mds
         5%    WindowServer
         3%    storedownloadd
         3%    MacsFanControl
         2%    com.avast.proxy
Top Processes by Memory: ℹ️
    438 MB    softwareupdated
    292 MB    Safari
    163 MB    com.avast.daemon
    160 MB    com.apple.WebKit.WebContent
    112 MB    iStatMenusDaemon
Virtual Memory Information: ℹ️
    3.28 GB    Free RAM
    3.84 GB    Active RAM
    624 MB    Inactive RAM
    739 MB    Wired RAM
    2.52 GB    Page-ins
    53 MB    Page-outs
Diagnostics Information: ℹ️
    Apr 1, 2015, 02:05:41 PM    Self test - passed
    Apr 1, 2015, 11:51:03 AM    /Library/Logs/DiagnosticReports/com.apple.AmbientDisplayAgent_2015-04-01-115103 _[redacted].crash
    Mar 31, 2015, 04:43:57 PM    /Library/Logs/DiagnosticReports/ntfs-3g_2015-03-31-164357_[redacted].crash
    Mar 31, 2015, 04:39:52 PM    /Library/Logs/DiagnosticReports/ntfs-3g_2015-03-31-163952_[redacted].crash
    Mar 31, 2015, 12:38:13 PM    /Library/Logs/DiagnosticReports/ntfs-3g_2015-03-31-123813_[redacted].crash
    Mar 31, 2015, 04:16:25 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/garcon_2015-03-31-041625_[reda cted].crash
    Mar 31, 2015, 03:06:27 AM    /Library/Logs/DiagnosticReports/com.apple.AmbientDisplayAgent_2015-03-31-030627 _[redacted].crash

I am using InDesign CS5. I have a body of text which is ranged left with tabbed indents. My client now wants the copy to be justifed, keeping the tabbed indents. Help and advice needed please!

I am using InDesign CS5. I have a body of text which is ranged left with tabbed indents. My client now wants the copy to be justifed, keeping the tabbed indents. Help and advice needed please!

Hi
That screen grab helps a lot. There’s a much easier way of doing what you’re doing.
Remove all your tabs and set the text in justified paragraphs.
I’ve typed in dummy text in the example I made below, but after “19.1” put in a space and put your blinking cursor after the space and before the ’N’ of ‘Notices'.
Then hold down the Command key and hit Backspace (on Mac at least - it’s the key between the Inverted commas/ apostrophe key and the return key).
The text will jump into place the way you want it to.
Hope that helps
Paul
PS You can set a tab, instead of using a space, in the description I gave above. So, after 19.1 or 19.2 or 19.185 etc etc insert a tab, then hit the Command Backspace after every paragraph number and they'll all line up exactly together. You'll find that editing text within the paragraphs
after you've set it will be LOADS easier this way.
You can put the tab anywhere you want it to be using 'Command-ShiftT' and putting a 'left align' tab just after the number. Just type the Command Backspace after the paragraph number and it'll work

My iMac computer screen is blurred by black and white lines.

My iMac G5 screen is blurred by black and white horizontal lines and tiny rectangles. This occured after I woke it up from sleeping. Everything else seems to be working fine, but is impossible to see what I'm doing. Any ideas on how to fix this?

Fixed it! Rebooting the computer while holding down the command, option, P and R keys while letting the chime ring 4 or 5 times did the trick.

Make iMac screen Black and White

I have a 3.06 ghz imac running Leopard. I want to make the monitor show black and white (like greyscale back in the day). How do I do that? I've discovered different profiles under the Monitors CP. Thanks!

LMAO!!! perfect haha!! thanks heaps matt. I saw the screen black/white to the left of the greyscale checkmark but totally didn't see that till you mentioned it LOL. Thanks!

My ipod is smashed and i need to get a new screen, my ipod is currently black, when i get my screen fixed would i be able to change it into a white one?

My ipod is smashed and i need to get a new screen, my ipod is currently black, when i get my screen fixed would i be able to change it into a white one? and if so how much would it cost?

First: Apple does not replace screens or repair mobile devices in any way. They will replace the device.
Second: No. You will get the same model you had before.

When I turn on my iMac the white start up screen appears but then it goes onto a black screen

When I turn on my iMac, the white start up screen comes on with the noise. Then when it's supposed to show my accounts the screen goes black but I can still use the mouse?

Startup in Safe Mode
http://support.apple.com/kb/PH14204
Reset SMC. http://support.apple.com/kb/HT3964
Choose the appropriate method.

My 2011 IMac will not boot up past the White apple logo screen with the whirly circle

My 2011 IMac will not boot up past the White apple logo screen with the whirly circle. I have tried various commands but to no avail. does anybody have any advice?

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a Fusion Drive or a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.

Computer boots to black and white Darwin/BSD Screen

My iMac is running 10.4.11. While trying to edit user permissions for local networking, I made a huge mistake. I started changing a permission and realized in the middle that I had messed up. I quickly reset the launcher, and then reset the computer. when the computer was rebooting, It went directly to the darwin screen (black background white letters). I found a thread that gave me hope but ultimately did not solve the problem.
Booting to Darwin/BSD Screen (this is the like to the entire thread)
every thing worked as the article said it would until the end...
"Start up in Single User Mode and type carefully:
/sbin/fsck -y
Repeat the above until it says your disk is OK. Then:
/sbin/mount -uw /
cd /var/db/netinfo
mv local.nidb/ local.nidb.bad
ls -ln /Users
This last command will give you one line for each user, plus one for the "Shared" directory, which doesn't interest us. Each user will have a line like one of these:
<pre>
drwxr-xr-x 20 501 501 680 Jul 16 14:32 D. A. Hankerson
drwx------ 8 501 80 272 Jul 17 19:18 D.A. Hankerson
</pre>The second numeric field (501, 500) is the user ID (UID) and you need to list the uids against the shortname s given in the final column. Make sure you get the name right for UID 501! Then continue with
reboot
When you restart, you should get the Setup Assistant, just as if it was a new machine. You will be prompted for all of your user information. Be careful to use the same short name as previously for user 501." kind of confusing where to retype the user short name... in darwin or setup assistant
I followed all the steps then completed the Setup Assistant and just when it looked like problem solved, I was still sent back to the darwin screen.
Following the setup assistant only made more user accounts. the setup also would not allow me to input "." and " " (periods and spaces) as the article says.
Please help!
*Green text represents information specific to my machine.

While in the B/W desktop go to the System/Accessability preference pane and check to see if this checkbox is selected:
If it isn't toggle it on and then off again and see if there's any change.

The screen on my ipod touch is white all over and black in the upper right hand corner only with color dots and lines run to the left hand side but stop in the middle. how do i fix it?

right now it is the middle of april and i bought the ipod at the beging of Agust the year befor so it still has not been a year. currently it is thursday and the screen changed to the white and black corner on the monday earlier in the week (so 4 days ago). i had just broken up with my gril friend and we were fighting. in anger i through my ipod at the wall. i was aiming for my pillow on my bed so it would hit something soft but i missed and it hit the hard concrete wall in my room. when i looked at my ipod it had turn itself off and when turn on the screen was white with a little black in one corner. i have tryed to restart it by holding down the power and home button till it restarted but the screen only got brighter and then eventually went back the the brightness it was before and turn off. i can still turn the screen on but cant unlock. i know it is still working cause my alram still goes off in the morning. the ipod is a 4th generation ipod touch 16 GB memory and is black. can this be fixed at home on my own or do i have to take it in to apple. can apple even fix it or is my ipod past the point of repair. any advice would be nice. thanks in advance.

- Restore to factory settings/new iOS device.
If still problem, make an appointment at the Genius Bar of an Apple store since it appears you have a hardware problem.
Apple Retail Store - Genius Bar
Apple will exchange your iPod for a refurbished one for $99 fr a 16 GB 4G. They do not fix yours.
Apple - iPod Repair price

My iMac turns to black sometimes and need to restart it and then turns black again in 2 to 15 mins... how do i solve this problem?

My imac turns to black someitmes. And I need to restart it... sometimes it works good for like 30 min, sometimes it turns black again even when i was typing in my password and need to restart it again and again untill i really angry that i have to leave it alone as i am going to break it.
So, how do i solve this black screen issue?
I can still hearing the musics and vedios and games that are playing.

It sounds like you are having a overheating issue.
As old as your iMac is, have you cleaned out the dust? Dust buildup can lead to over heating issues. Remove any and all things plugged into it including the power cord, Remove the RAM access grille. Vacuum all openings starting with the RAM access area (air intake). Vacuum all ports and plugs, DVD slot and the opening across the top of the rear of the body. Blow compressed air through all your openings and vacuum again to remove any dust you loosend. Reinstall the RAM grille. Plug in the keyboard and mouse if not blue tooth. Insert power cord...
You are now in a perfect position to do a
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.
It is the 5 second timing that initiates the reset.
Here is a link to a Widget to monitor your temps and other operations:
http://islayer.com/apps/istatpro/
http://www.intelmactemp.com/list

Advice needed on white imac 24" screen - black levels

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