Screen problems 2010 iMac flickering squares

I have a 2010 iMac and I'm seeing flickering magenta, green and blue squares/rectangles in a pattern on my screen mostly upon waking from sleep. It was in small areas a few months ago and now it's covering more of the screen. Sometimes pressing keys or moving the mouse makes them go away or change. Resetting the SMC and PRAM helps for a few days, but usually using the computer for awhile makes them completely disappear. I'm curious if this is the GPU having some issues.
I am currently running the Apple Hardware Test so I'll post the specific specs of the iMac once it's done. Curious if anyone else has had this problem.
Thanks!

Update: It's a 27-inch Mid-2010 iMac with ATI Radeon HD 5750 1024 MB, 2.93 GHz i7, 16GB RAM, and extended Hardware Test showed no issues.

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HP HDX16 Screen Problem (Fuzzy, blurry, flickering)

So, I'm having some issues with my HDX which has been flawless. It'sjust over 18months old.
One day all of a sudden the screen went fuzzy. I noticed when I bring the screen down (toward closing position) it then sharpens up and goes back to normal but only at that angle.
At first when this happened, the longer the laptop was on, the further I could push the screen back without it going fuzzy.
But now I can't and I can only view the screen at quite a low angle, it's very close to the keyboard. I've noticed it's going lower and lower each day!!
When the screen goes fuzzy it can be just fuzzy or even a coloured fuzz (different variety). It can also flicker to normal and fuzzy when I’m trying to find that angle where I can get a clear screen.
I’ve looked online and people have tried changing the inverter but the problem is still there, even buying a new lcd!! But it still could be one of them.
I know it’s not an lcd problem as the screen is flawless when I find that clear angle. Any suggestion please? I have a feeling it’s going to reach a point when I won’t be able to see anything at all and it’ll stay fuzzy.
I just called HP and they offer NO support for HDX models if it's got to do with the screen. But if it's for example a keyboard or non screen related problem they are willing to do an out of warranty repair.
I obviouslt questioned the guy and said it must mean you guys have a lot of screen problems but he claims all aprts are out of stock and product is discontinued. Surely they would still have a lot of parts anyway.
Anyone else have any suggestions?

If the external display works well then there could very well be a loose connector causing the problem. That will require disassembly to investigate.
Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Screen Problems with iMac G5 20" (iSight)

Hello!
I had the same problem with my iMac G5 20" (iSight) as described by Bob North Apr. 18, 2006 at http://www.macintouch.com/readerreports/imacg5/topic2276.html#apr25:
"""" I repair Apple products, and recently I've seen strange and erratic display problems with the G5 flat-panel (iSight) 17" and 20"...and I am very curious about the origin. The picture will display what I will call "plaid pixles". Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display. The desktop, or whatever, can still be distinguished in the background, but it is overwashed by the plaid patterns -- which do change slightly, and also cover the full space of the screen. I've seen different scenarios, 3 in 2 weeks, where the symptom is exhibited with no particular failure pattern -- both before and after repair. I've replaced the main logic on one occasion, with no fix...but the 2nd try replaced both display panel and inverter. The display issue was fixed, but the system exhibited lockups only when it reached the destop. Another repair the same issue was seen after replacing the 20" main logic, where the symptom was not present previous. Personal opinion of the late 2005 IMAC flat-panels, in the hardware sense, is the likelihood of component manufacture issues, possibly the main logic boards or the panel displays themselves. Repair of this model, as opposed to the earlier, non-iSight flat-panel 17 and 20" models are extremely difficult -- access to main componenets is blocked by the display panel, which must be removed for each troubleshooting attempt. The internal hardware design is not oriented for repair ease...they are by far the most difficult to work on.
Any input regarding the display issues? Thanks.""""
I can't use the mouse or anything else, and after a while the fans start to go on max. This is the second time I encounter this problem within 30 days. What I have noticed is that the day before, the brightness of the screen started to "blink" slightly -- like if the screen tried to adjust itself.
But I haven't experienced what Bob North describes as the: "Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display".
I just restart with the power button and everything is working OK. I made an Extended Hardware test without any problems detected.
I have been looking for this issue with iMac G5 20" (iSight) and only found it at http://www.macintouch.com/readerreports/imacg5/topic2276.html#apr25 :
Apr. 18, 2006
bob north
I repair Apple products, and recently I've seen strange and erratic display problems with the G5 flat-panel (iSight) 17" and 20"...and I am very curious about the origin. The picture will display what I will call "plaid pixles". Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display. The desktop, or whatever, can still be distinguished in the background, but it is overwashed by the plaid patterns -- which do change slightly, and also cover the full space of the screen. I've seen different scenarios, 3 in 2 weeks, where the symptom is exhibited with no particular failure pattern -- both before and after repair. I've replaced the main logic on one occasion, with no fix...but the 2nd try replaced both display panel and inverter. The display issue was fixed, but the system exhibited lockups only when it reached the destop. Another repair the same issue was seen after replacing the 20" main logic, where the symptom was not present previous. Personal opinion of the late 2005 IMAC flat-panels, in the hardware sense, is the likelihood of component manufacture issues, possibly the main logic boards or the panel displays themselves. Repair of this model, as opposed to the earlier, non-iSight flat-panel 17 and 20" models are extremely difficult -- access to main componenets is blocked by the display panel, which must be removed for each troubleshooting attempt. The internal hardware design is not oriented for repair ease...they are by far the most difficult to work on.
Any input regarding the display issues? Thanks.
Apr. 19, 2006
Robert Mohns
bob north describes: "...recently I've seen strange and erratic display problems with the G5 flat-panel (iSight) 17" and 20"...and I am very curious about the origin. The picture will display what I will call "plaid pixles". Upon boot, the dispaly appears normal, but within 5-10 minutes, either at desktop or in ASD, the normal display will "crash" to the "plaid" display. The desktop, or whatever, can still be distinguished in the background, but it is overwashed by the plaid patterns -- which do change slightly, and also cover the full space of the screen."
Does it look anything like this?
http://downwardspiral.net/gallery/pbg4-display
My nearly 3 year old Titanium PowerBook G4 just did this one day, out of the blue. The problem went away after a few minutes, but I had already taken photos. Thanks to those photos, Apple gave the powerbook a new logic board.
(This PowerBook has had its logic board replaced twice, a new optical drive, and a cracked case edge replaced. AppleCare has more than paid for itself. Despite the occasional problems, I remain very happy with this machine. I'm sure I'd be much less happy if I had not bought AppleCare!)
Hubert

Hubert Frank,
To Apple Discussions!
What troubleshooting methods have you tried to solve your issue?
The knowledgeable users will need this info to avoid the "been there, done that" senerios.
Have you tried the methods mentioned in the following Knowledge Base Article?
http://docs.info.apple.com/article.html?artnum=301283 Troubleshooting when there's no picture on the display
Do you have AppleCare? If so, have you contacted them? If so, outcome?

Various Screen Problems with iMac G5 20" 1.8

I have a iMac G5 20" 1.8 running 10.4.3 with 2GB RAM
I bought it in July 2005 on Ebay in the UK (the previous owner bought it in January 2005)
The Mac ran fine for months until the start of November when I started having all these problems (which many other iMac G5 20" 1.8 owners are having around the World):
1. Screen is sometimes darker at the top than the bottom after I have started the Mac up (this sometimes fixes itself if I do a Restart).
2. Screen sometimes starts up darker all over (in a slight pinkish hue colour).
I have tried all the usual things that people have suggested on this Discussion Board and many other Apple Message Boards to try and sort these problems but nothing seems to fix it.
I have tried resetting the PRAM
I have tried re-installing the OS.
Why was the iMac was fine for almost 6 months and then the problems started occurring?
Was it because I installed OS X 10.4.3? Because it was around that time when the problems began
Has anyone else managed to get Apple to fix these problems that they've been having with their iMac G5's under Apple's current iMac G5 Repair Extension Program for Video and Power Issues?
iMac G5 Repair Extension Program for Video and Power Issues
See this webpage:
http://www.apple.com/support/imac/repairextensionprogram/
How long did the repair take?
Is there a risk that I could be charged for any repairs?
My Serial Number is one of the serial numbers that is mentioned in the Repair Extension Programme

Hi
I have made a discovery!
When I start up in Safe Boot Mode I don't have any Kernel Panics/Crashes or Screen Freezes, etc any more!!??
Is this a good thing?
Can I use my iMac in Safe Mode all the time? Everything is working and enabled in Safe Mode apart from sound and some fonts from what I have found out so far. (I read that sound won't work in Safe Mode)
Does this mean that the problems I have been having are not Hardware problems after all and are only Software Conflicts/Issues?
I await all your replies with interest!
Cheers

My Magic Mouse (wireless) paired with my 2010 iMac: Often at startup the cursur just sits in top left corner of screen, frozen. Not a battery problem. New. I take batteries out, reboot (a real pain)... then ok. HELP!

My Magic Mouse (wireless) paired with my 2010 iMac: Often at startup the cursur just sits in top left corner of screen, frozen. Not a battery problem. New. I take batteries out, reboot (a real pain)... then ok. HELP!

Hello:
Try resetting the PRAM and SMC.
Barry

IMac screen has been flickering, does anyone know the problem?, iMac screen has been flickering, does anyone know the problem?

Recently my iMac screen has started to flickering does anyone know the problem?
Any help appreciated

Bad power, unshielded speakers, improper hardware installs which lead to loose cables, can all cause this.

Mid 2010 iMac Problems

I have a 21.5" Mid 2010 iMac with 16 GB RAM, running 10.8.5.
Problem #1
It's recently started doing some odd behavior when waking up from sleep. I have the screen saver set to come on after 5 minutes of inactivity and then the display and computer both sleep at 15 minutes.
When I try to wake the computer up by moving the mouse, it takes anywhere between 5-10 seconds for the password prompt to pop up and then it's another 2-5 seconds before it will let me type in the box. It also seems that when the computer sleeps, the wifi is disconnecting, because the computer won't have received any new email and all my mailboxes have the little exclamation symbol next to them.
After about 5 seconds or so once the computer fully wakes up, it reconnects and pulls all my new mail.
Problem #2
This usually happens when I just browsing facebook or youtube or something like that, but when I switch over to another application and come back to Safari, I will get the beach ball for a few seconds and then the computer will freeze. The mouse cursor turns into the little "I" symbol like when you go to type or highlight text. The only thing I can do at this point is a restart.
Problem #3
I have spaces set up with Safari, Mail, iCal, and iTunes in spaces 1, 2, 3, and 4. Most of the time I'm in Safari, but if I move to another space either with the mouse or the keyboard shortcut, to check for new mail, for instance, and go immediately back to Safari, it will on it's own jump back to the space I just left. It happens with any space no matter what. I use the option + arrow keys to go between spaces a lot.
Does anyone have any idea why this happens? Thanks for your help.

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins* and log in as Guest. Don't use the Safari-only “Guest User” login created by “Find My Mac.”
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
Test while logged in as Guest. Same problem?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
*Note: If you’ve activated “Find My Mac” or FileVault, then you can’t enable the Guest account. The “Guest User” login created by “Find My Mac” is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. Note: If FileVault is enabled on some models, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem?
After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of steps 1 and 2.

Windows 7 blue screen on Mid 2010 iMac running 10.8

I had previously had the 64 bit version of Windows 7 Home Premium running on my mid 2010 iMac running 10.7. However, after upgrading to 10.8, my Windows installation would blue screen after booting. I suspect this was due to upgrading to 10.8 as I didn't make any changes to my Windows install because I only use it for gaming.
I've since removed the Windows partition, and tried a clean install via the Boot Camp Assistant. Windows installs just fine and boots cleanly. However, after installing the Apple Boot Camp drivers (freshly downloaded during the Boot Camp Assistant process), Windows blue screens upon booting. I can repair the Windows install using the built in process, but any attempt to install Apple's drivers results in blue screening. I've tried a clean Windows install and redownloading Apple's drivers several times with no luck.
Does anyone else have any suggestions on how to resolve this problem? Thank you for your help!

I do see this. And I suspect Windows updates. Not Apple (though I would be the first to suspect those too).
iMac graphic drivers for Windows seem touchy and common. The April Windows monthly patch updates hit a few iMac users.
One person found that if they only did updates in smaller steps and not all at once they were fine.
Tuesday this week was another Patch Tuesday.
Games, heat, disk blocks, even RAM errors - one person recently we went round and round... bad blocks not heat, new disk drive and they were 100% stable and rock solid but was hard to rule out. Windows though is easier to test RAM and sectors. And Lion was not even aware or sensitive to those bad sectors and read errors OR RAM errors that Memtest clearly showed (run in OS X).
One person had upgraded RAM, low and behold the new DIMMs were just not fully pushed in and seated and making good contacts.
Try to rule out hardware. Maybe you stumbled on bad block being used now. Run chkdsk if nothing else.
And when updating or preparing to, run Registry cleaner in CCleaner first, Go To %TEMP% and remove everything there. Make a system backup image to another disk drive (NTFS) or with WinClone 3 (HFS, $20) or CampTune ($20).
Or it could just be uninstall one driver at a time, start with GPU, look at what was last installed. Windows drivers are not desireable for GPU. Get the one from AMD or Nvidia instead.

2010 iMac 27 Inch flicker and black screen, not solved by firmware updates

Hi all, I hope someone can help me. I've got a 27 inch 2010 imac that has started to flicker black, and sometimes turn completely black. When this happens the only thing I can do to remedy the issue is to put the computer to sleep and wake it again with the power button on the back. I have tried using the 2009 firmware fixes floating around on the net but to no success, and having seen youtube videos of other people's flicker issues that were fixed by this, and as far as I can see it isn't the same issue. The whole screen flickers, not just a horizontal band.
I have no secondary monitors plugged in, and my only peripheral items are external hard drives. The issue still happens regardless as to what's plugged in.
Any suggestions would be greatly appreciated. I'm awaiting a call from apple support, but they have had me in a queue for a week so I thought it prudent to shop around for help.
Cheers
Simon

Here are other links to try: Apple Service, iMac Service or Apple's Express Lane. Do note that if you have AppleCare's protection plan and you're within 50 miles (80 KM) of an Apple repair station, you're eligible for onsite repair since yours is a desktop machine.

Mid 2010 iMac Windows 7 Problem

Hey there,
I have an Mid 2010 iMac running OSX Lion and I have Windows Vista installed via Bootcamp.
I have Windows 7 saved to a USB drive, and I tried to upgrade to 7 directly from within Vista but when the installation was completing I just got a black screen. I restarted a few times, but still got the black screen during the end steps.
I've tried to start from scratch about 3 times now, but it still wont work.
Can this problem be solved?

I'm experiencing the black screen crashes since I started using Windows 7. It doesn't matter if it's 32 or 64 bit, the issue is persistent. First I thought it was the updated nVidia drivers, but after putting a fresh installation of Windows I left the original Boot Camp graphics drivers and the same black screen crashes continued.
However, when I'm running various computer games which utilize lots of GPU power, crashing never happens. Then, when I exit and start using Explorer, IE, MS Office and other simple tools, my computer goes dark. I don't believe reinstalling would change anything. This is definitely a unique problem that I just can't seem to figure out.

2010 iMac having sleep problems

I have a late-2010 21.5" iMac (3.2GHz Intel Core i3 / 8GB RAM) running OS X 10.9.2
It's always been very well behaved and never had any problems. However, since upgrading to Mavericks recently, it's been having some sleeping issues.
Whilst asleep, the computer will 'semi wake up' – basically I can hear the hard drive whirr into life, but the screen remains off. It does this for about 1 minute, then goes back to sleep again.
It didn't bother me, I assumed it was a new feature like Power Nap (?), where the mac was doing something like waking up to check emails in the background, without properly waking up.
However, recently, the mac will stay in this half-awake state, and there's nothing I can do. So the hard drive is spinning, the mac is getting really hot, but the screen is off. It remains unresponsive to any keyboard or mouse input. It stays like this for as long as possible – until I hold down the power button to force a shut down.
It's becoming frequent. Should I be worried? Anything I can try to fix it? I was considering a blank Mavericks install...
Thanks

Thanks for the tip. Here's the results...
Hardware Information:
iMac (21.5-inch, Mid 2010)
iMac - model: iMac11,2
1 3.2 GHz Intel Core i3 CPU: 2 cores
8 GB RAM
Video Information:
ATI Radeon HD 5670 - VRAM: 512 MB
System Software:
OS X 10.9.2 (13C1021) - Uptime: 0 days 2:11:52
Disk Information:
ST31000528AS disk0 : (1 TB)
EFI (disk0s1) <not mounted>: 209.7 MB
Macintosh HD (disk0s2) / [Startup]: 999.35 GB (400.4 GB free)
Recovery HD (disk0s3) <not mounted>: 650 MB
OPTIARC DVD RW AD-5680H
USB Information:
Line 6 TonePort UX1
Apple Internal Memory Card Reader
Apple Inc. BRCM2046 Hub
Apple Inc. Bluetooth USB Host Controller
Western Digital Ext HDD 1021 2 TB
EFI (disk1s1) <not mounted>: 209.7 MB
Time Machine 2TB (disk1s2) /Volumes/Time Machine 2TB: 2 TB (1.16 TB free)
Apple Computer, Inc. IR Receiver
Apple Inc. Built-in iSight
Thunderbolt Information:
Gatekeeper:
Mac App Store and identified developers
Kernel Extensions:
[kext loaded]     at.obdev.nke.LittleSnitch (4052 - SDK 10.8) Support
[kext loaded]     com.Cycling74.driver.Soundflower (1.6.6 - SDK 10.6) Support
[kext loaded]     com.line6.driver.xtaudio (7.3.6 - SDK 10.7) Support
[not loaded]     com.wacom.kext.pentablet (5.2.5) Support
Launch Daemons:
[running]     at.obdev.littlesnitchd.plist Support
[loaded]     com.adobe.fpsaud.plist Support
[loaded]     com.adobe.SwitchBoard.plist Support
[running]     com.line6.l6ksettingmgr.plist Support
[invalid]     com.oracle.java.Helper-Tool.plist
Launch Agents:
[running]     at.obdev.LittleSnitchUIAgent.plist Support
[not loaded]     com.adobe.AAM.Updater-1.0.plist Support
[running]     com.adobe.AdobeCreativeCloud.plist Support
[loaded]     com.adobe.CS5ServiceManager.plist Support
[invalid]     com.oracle.java.Java-Updater.plist
[running]     com.wacom.pentablet.plist Support
User Launch Agents:
[failed]     com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plis t
[loaded]     com.google.keystone.agent.plist Support
[running]     com.spotify.webhelper.plist Support
User Login Items:
Growl
LittleIpsum
Dropbox
Google Drive
Alfred
Google Chrome
Color Picker
Internet Plug-ins:
WacomNetscape: Version: 1.1.1-1 Support
Default Browser: Version: 537 - SDK 10.9
Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 Support
AdobeAAMDetect: Version: AdobeAAMDetect 2.0.0.0 - SDK 10.7 Support
FlashPlayer-10.6: Version: 11.7.700.225 - SDK 10.6 Support
Silverlight: Version: 5.1.20913.0 - SDK 10.6 Support
Flash Player: Version: 11.7.700.225 - SDK 10.6 Outdated! Update
QuickTime Plugin: Version: 7.7.3
iPhotoPhotocast: Version: 7.0 - SDK 10.8
AdobeExManCCDetect_x86_64: Version: AdobeExManCCDetect_x86_64 1.0.0.0 - SDK 10.7 Support
AdobePDFViewer: Version: 10.1.1 Support
JavaAppletPlugin: Version: 14.9.0 - SDK 10.7 Check version
Audio Plug-ins:
BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
AirPlay: Version: 2.0 - SDK 10.9
AppleAVBAudio: Version: 203.2 - SDK 10.9
iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
Google Earth Web Plug-in: Version: 7.1 Support
3rd Party Preference Panes:
PenTablet Support
Flash Player Support
Flip4Mac WMV Support
Line6AudioMIDI Support
Time Machine:
Auto backup: YES
Volumes being backed up:
Macintosh HD: Disk size: 930.71 GB Disk used: 557.81 GB
Destinations:
Time Machine 2TB [Local] (Last used)
Total size: 2
Total number of backups: 96
Oldest backup: 2011-12-11 18:14:17 +0000
Last backup: 2014-04-28 21:31:42 +0000
Size of backup disk: Adequate
Backup size 2 > (Disk used 557.81 GB X 3)
Time Machine details may not be accurate.
All volumes being backed up may not be listed.
Top Processes by CPU:
    9%     mds
    1%     WindowServer
    0%     Little Snitch Network Monitor
    0%     Dropbox
    0%     Plex Media Server
Top Processes by Memory:
279 MB     mds_stores
164 MB     com.apple.IconServicesAgent
147 MB     Google Chrome
131 MB     softwareupdated
98 MB     Dropbox
Virtual Memory Information:
3.12 GB     Free RAM
2.40 GB     Active RAM
1.68 GB     Inactive RAM
814 MB     Wired RAM
930 MB     Page-ins
0 B     Page-outs

I have a problem with Imac mid 2010 graphics card (ATI Radeon 5670 512MB)

I have a problem with Imac mid 2010 graphics card (ATI Radeon 5670 512MB). When I play video formats like xvid, mkv, avi iMac freezes and emits horrible sound,in service said the problem is not overheating. Not a problem with memory or hard disk because I placed second correct parts.The same problem is with OSX 10.6.8 and 10.8.4 and other players.Apple hardware test found no problem and tech tool pro found no fault.
After five days of testing in the service they can not found fault and it was decided to change the graphics card.
New graphics have been tested for two days but it is not reproduced divx ... but their test software which did not find any fault on the old graphics...
Do I have the right to complain if repair does not fix the problem because I use non apple softwere and video formats.

You could look at the System Profile for the info it presents for the card. But why wouldn't you think it's not up to date if you have the latest install (according to your sig above)?
What program are you trying to run? Is there anything in the system log?
I think it's the program that's having the problem and not anything with your video software.

Having problems connecting iMac(late 2006) running 10.7.5 to a Samsung Flat Screen TV using separate audio/speaker cable and HDMI standard cable, mini-DVI to HDMI video converter. TV displays generic Apple galaxy background and "some" windows (e.g. scree

Not sure that I have selected the correct forum. Hope my questions are clearly stated.
Having problems connecting iMac(late 2006) running 10.7.5 to a Samsung Flat Screen TV using separate audio/speaker cable and HDMI standard cable, mini-DVI to HDMI video converter. TV displays generic Apple galaxy background and "some" windows (e.g. screen resolution choices). It does not show Mail or Safari menus. System preferences' display "gathered" the Samsung and chose its resolution. I did not find a way to select the Samsung as my display.
In addition to having old hardware, we have Verizon FIOS providing internet and TV access. Is there any way to make this work for us? We would like to stream video (Netflix) and view shows from the Web. Do we need Apple TV to do this? Or is it not possible with our old iMac? My husband thinks that our Airport could be a factor.
Thank you

Lately, I have been seeing a lot of posts with users trying to use their Macs/iMacs to mirror their streaming video from their Macs to an HDTV.
There are, actually, many alternatives to choose from than just from a Mac.
You need to have or invest in a WiFi capable router for all of these examples.
Apple TV only integrates with WiFi and newer Mac hardware. So, if you want to have total integrated experience, if you have a 2011 Mac or newer, you might as well pay the $100 for the AppleTV box.
If you have a older Mac, like I have noticed many users do, then you have other options.
If you want to elimate long cable clutter and having your Mac at the mercy of your TV all of the time, you can still use the AppleTV box independently or purchase cheaper alternative media streaming boxes from Roku, Sony, Boxee or any number of electronics manufacturers that now have media streaming boxes and media streaming capability built into DVD/Blu-ray players.
These eliminate long cable clutter by being close to the HDTV where shorter, less expensive cables can be used.
Another alternative for iPad users is to use an iPad with the USB/HDMI video adapter and use your iPad as the streaming box. This ties up your iPad in much the same way as it does with your Mac, but again the iPad can be close to the TV and use minimal cables to the TV.
Another alternative to is to use a combination of an iPad and your Mac to stream content that is only available to stream online from a computer. In this case, you can use a desktop remote app on your iPad and Mac. A good and cheap Desktop Remote app is Splashtop Remote. This allows you to completely connect your iPad remotely, over Wifi, to your iMac desktop. The app streams both video and sound to the iPad which is still connected to your HDTV. The resultant stream video picture will be smaller than the size of your HDTV, but it will still be plenty large enough to watch. Again, if you own a iPad and an Intel Mac, this method also allows minimal cabling to the TV.

After upgrading to Mountain Lion my 2009 (early 2010) iMac mutes audio when awaking or when it goes to sleep. Anybody else having the problem?

After upgrading to Mountain Lion my 2009 (early 2010) iMac mutes audio when awaking or when it goes to sleep. Anybody else having the problem? My other iMacs are not having that problem. I'm not sure if I am missing an option somewhere or what is going on.

http://www.reedcorner.net/understanding-upgrade-nightmares/ (Thomas)
See if you have supported applications > http://www.roaringapps.com

IMac G5 Graphic Card Replacement for blue screen problem

When I turn on iMac, I only see blue screen, the apple technician said Need to replace graphic card, Nvidia Gforce 7600GT 256.
1, can it install in IMac? Seem like it work for PC?
2, I had blue screen problem several time, I think I turn on iMac too long, so it burn out graphic card.
3, I have 2007 G5 24" screen model, is any durable and afford graphic card you recommend?
Where to buy for cheaper price?
Do I need to change mother board?
4, can I replace it by myself? Any picture or video for graphic card replacement?
Thank you.

If you look around, you might be able to find someone who will replace just the chip on the graphics card, which is what usually fails. It will take someone highly skilled; they really have to know what they're doing--it's not an ordinary soldering job.
Here's someone who found a non-Apple service to do this, and it proved to be far less expensive than a full logic board replacement. But I think this was in the UK.
https://discussions.apple.com/thread/4996559?start=0&tstart=0
I have no personal experience with this outfit, but you might check them out.
http://dttservice.com/

Screen problems 2010 iMac flickering squares

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