iMac monitor/video issue

[synthfreek]

Hello,
My Mom's 2011ish iMac is having a video issue (please see attached photo). There are groups of pixels making up blocks across the screen. They're not consistently showing up in the same spot and sometimes there are a lot more on screen than other times. Does anyone know if the video card is repairable (if that is what is wrong) or have any other suggestions?
Thanks for any suggestions!

 

[NajamQ]

Hello,
My Mom's 2011ish iMac is having a video issue (please see attached photo). There are groups of pixels making up blocks across the screen. They're not consistently showing up in the same spot and sometimes there are a lot more on screen than other times. Does anyone know if the video card is repairable (if that is what is wrong) or have any other suggestions?
Thanks for any suggestions!

Seems like lose ribbon connection between display and logic board.

It's worth visiting Apple repair store, those iMacs are easy to open as they have megnatic latches.