Red and green square dots?

I am so glad I found this discussion. I also have a 2010 iMac that I purchased in 2011 and assuming apple products would live up to their name I didn't purchase apple care. I am having the same pixel problem and its very random with different applications.. Just did a complete reinstall last night, I am not too positive this will work but it was another attempt at trying to get rid of the pixels and freezing problem. I think I'll just trade it in for a Mac book...expercom.com has good trade in prices.. They are lemon machines that apple is not taking responsibility for.... We should all email...

jmf,

Two weeks have gone by and still no sign of those red and green squares. Everything seems to be back to normal. Of course, I don't have much confidence that my good luck will continue...

dgd2000

Even though another on this list changed the drive with other hardware to no avail, I still believe the drive is a suspect. Thanks for the report.

jmf

dgd2000 wrote:

jmf,

Two weeks have gone by and still no sign of those red and green squares. Everything seems to be back to normal. Of course, I don't have much confidence that my good luck will continue...

dgd2000

I've had the same problem as everyone else, I've tried a bunch of things to see if it would fix the issue, nothing helped. When I boot in safe mode I have no problems with the dots and doesn't freeze up at all. Seems to be a software issue.

Thought I had it fixed permanently. It came back after two months. Not sure why. This problem is so frustrating. I have given apple a chance and I have been burned severly.

Hi Jack

Yes, I had my hard drive replaced in December. Still have the problem with the squares.

My machine is a Mid 2010 27-inch with a Radeon 5750, running Mavericks. (And I had the squares before Mavericks.)

There is no doubt that this is a manufacturer's defect and that Apple should step up with a solution.

There is little to no common trail regarding this issue. Fodden, have you tried to reduce resolution to "Scaled" 1920 x 1080?

jmf

How about Ram? I bought my ram from Crucial.com after I purchased my mac. Any chance that this could be related to faulty ram?

I have non-apple approved ram as well.

I have 16GB of crucial memory.

I am going to try and remove my ram and go back to the apple ram that came with my computer. I will comment if I notice any improvements.

Could be the anomaly is not caused by system RAM, if this

pertains to Dark Pixel, Bright Pixel, or Foreign Material...

•Learn about About LCD display pixel anomalies for Apple products released in 2010 and later

However there likely would be a fee to determine what may be

an actual cause, be it a graphic processor issue, or other.

This conversation supposedly branched to another thread,

but I hadn't found the linked topic yet.

Good luck & happy computing! 🙂

I have Apple installed Ram that was installed in my iMac and shipped from the factory (Apple). Just to see if the symptoms are lessened by adjusting the video card resolution, maybe somebody here could try it and report. Thanks

jmf

I posted previously on another thread, but I'm another person experiencing the same issues.

2011 iMac 27-inch with the Radeon HD 6770M running 10.6.8 (Snow Leopard); At first I was just experiencing flashing squares every now and then but they worsened over time, gradually taking over my entire screen. I've recieved video card related errors while playing a game on my Windows partition (I run Windows 7 through Bootcamp) that caused the game to freeze to crash, and it has gotten hung up and crashed at least once on both my Mac OS and Windows.

I've been trying to keep up with the forum posts to see if any clear solutions have been posted, but I don't see any? Unless I missed it. I ended up taking the computer into the Apple Store last week, only to be told it was the OS and that it needed to be reinstallled. Note that they said they could not replicate my problem "running their software" prior to the fresh install. They did not completely wipe my hard drive as they left the Windows partition in tact. I asked them to turn it on in the store to make sure that it had actually fixed the problem, and guess what! It worked perfectly in the store.

Of course.

Took it home, worked fine for a few hours... I decide to try installing some of my backed up files. As SOON as I bring up Time Machine, I begin to see squares again. Joy. I haven't installed anything but the drivers for my mouse and keyboard (I use a razer naga and anansi) and the only thing I plugged in was my external hard drive.

I was considering upgrading to Maverick but I've heard that it might make the problem worse? Has anyone had success with anything? I want to take it back to the Apple store, but I'm afraid they will just wipe the hard drive again or start throwing random parts at it. Has anyone had success with a replaced video card or any other parts?