iMac (Early 2006 20-inch) with lines in display, Fixable?

I have a  iMac (Early 2006 20-inch) with lines in the video (see attached image).  I'm guessing the video card is shot.  Can this be replaced easily in this model without replacing the entire motherboard?  Thanks in advance.

Serial Number: W86165RGU2P
Model:       - iMac (Early 2006 20-inch)
Codename:       - No codename assigned.
Build Country:       - This unit was built in Changhai, China.
Build Year:       - This unit was built in 2006.
Build Week       - Your Mac was built in week 16 of that year (April).
Production Nr.:       - This unit was number 1206 to be built that week.
IMG-20141213-143443931-HDR.jpg
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1namylnAsked:
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strungConnect With a Mentor Commented:
This sounds like your problem here:  https://discussions.apple.com/thread/2389074?start=0&tstart=0

Long and short is that it is probably a hardware problem and Apple may have had an extended warranty on it at some point, but I doubt they do now considering the computer is 8 years old.
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Michael-BestCommented:
"Can this be replaced easily"

No.
It is cheaper to recover your data and move on to a newer Mac.
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nobusCommented:
could be a screen problem; you would have to test with another one first
does the imac have an external video connector?  try with another monitor then, this will show if the problem is with the card, or dispaly
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Michael-BestCommented:
I checked the specs. and this Mac supports a second display.
If its the display thats faulty you can connect a second display via the mini-DVI port.
Select dual display "extended desktop" mode.
You will need the optional Apple DVI-to-VGA adapter and a VGA connected display ( monitor ).

If must repair this Mac then contact missionrepair.com

Link:
http://www.missionrepair.com/iMac_Superior_Service_s/360.htm
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Michael-BestCommented:
Did you connect a second display via the mini-DVI port to confirm which hardware is faulty?
Others reading this post may find the infomation helpfull.
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