Mar 09 iMac with vertical green lines

I wrote a post regarding this issue in July and have just now had the chance to take the iMac to the Apple Store. Didn't just add to the post because it has been archived so I'm updating with a new post. I've read lots of posts regarding earlier Intel iMacs but no new gen machines. Has anyone seen this in 2009 iMacs? or is mine "special".
My almost brand new (Mar 2009) iMac has been acting up. Beginning about a week ago at the gray startup screen there has been a band of green vertical lines showing up. The band is about three inches wide and runs from top to bottom of screen. Disbursed between the lines are continuous bursts of green static similar to snow on an old TV set. The lines disappear when the desktop comes up.
Then after a few minutes to a few hours after startup depending on how long the iMac has been turned off the lines begin to appear in the same field on my desktop, usually intermittently dispersed across the three inch field (not as solid as at startup).
I took it in to show a Genius at the AS this afternoon and as soon as he saw the startup screen he said they should have it fixed by the end of the week. He ordered a new board and a new screen for the iMac saying if the board doesn't fix it he'll have them put in the screen to see what that does.
Great service, I'm bummed about the issue and having to drive all the way to Scottsdale and back from Flagstaff. Hope this fixes it. They say they will call me when it's ready to pick up.

Yeah, I know, but all the third party AASPs the Apple Phone Rep ID'd for me In Flagstaff are, from personal experience, bums.
One took two days to determine if my G5 iMac (it was just a year and a half old with bad logic board and PSU caps and covered by Apple Care) was eligible for repair under Apple's extended repair program. They incorrectly decided it wasn't, even though that didn't matter due to the Apple Care coverage.
The other place actually returned the G5 iMac to me in pieces, saying, among other things, "...sorry...".
I took it to Sedona to the Mac Clinic for it's covered repair. That mechanic is great, but usually backed up by two or three weeks.
There is still the great Apple mechanic in Sedona but he is always backed up by about three weeks. So it was off to Scottsdale, probably a half hour longer trip than to the Phoenix store, and an hour longer than to Sedona, but perfectly easy parking because most of the stores in that mall are still under construction.
Ah, life in the big city.
Thanks for the note - probably more response than you needed. Oh, and I do plan to purchase Apple Care - wouldn't be caught with a dead computer without it. Mac's and Apple Care - probably the last good deal in town, though it's been my experience that it's not usually needed, other than the G5 all my Mac's (back to a B&W Mac Classic) are still running.

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    EtreCheck version: 1.9.11 (43) - report generated May 23, 2014 at 3:26:05 PM GMT+3
    Hardware Information:
              iMac (27-inch, Late 2009)
              iMac - model: iMac11,1
              1 2.8 GHz Intel Core i7 CPU: 4 cores
              4 GB RAM
    Video Information:
              ATI Radeon HD 4850 - VRAM: 512 MB
    System Software:
              OS X 10.9.2 (13C1021) - Uptime: 0 days 0:49:51
    Disk Information:
              ST31000528AS disk0 : (1 TB)
                        EFI (disk0s1) <not mounted>: 209.7 MB
                        I Mac Drive (disk0s2) / [Startup]: 542.08 GB (373.66 GB free)
                        Recovery HD (disk0s3) <not mounted>: 650 MB
                        I Mac Drive 2 (disk0s4) /Volumes/I Mac Drive 2: 457.13 GB (282.47 GB free)
              OPTIARC DVD RW AD-5680H 
    USB Information:
              Apple Computer, Inc. IR Receiver
              Apple Inc. Built-in iSight
              Apple Inc. BRCM2046 Hub
                        Apple Inc. Bluetooth USB Host Controller
              Apple Internal Memory Card Reader
    Configuration files:
              /etc/hosts - Count: 20
    Gatekeeper:
              Mac App Store and identified developers
    Problem System Launch Daemons:
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              Garmin Express Service
              iTunesHelper
              Dropbox
              Degrees
              AdobeResourceSynchronizer
              BitTorrent
              Google Chrome
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    Audio Plug-ins:
              BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
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    iTunes Plug-ins:
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    User Internet Plug-ins:
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    3rd Party Preference Panes:
              Flash Player  Support
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    Time Machine:
              Skip System Files: NO
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              Auto backup: YES
              Volumes being backed up:
                        I Mac Drive: Disk size: 504.86 GB Disk used: 156.86 GB
              Destinations:
                        I Mac Drive 2 [Local] (Last used)
                        Total size: 425.73 GB
                        Total number of backups: 7
                        Oldest backup: 2014-05-06 18:36:54 +0000
                        Last backup: 2014-05-23 12:02:15 +0000
                        Size of backup disk: Too small
                                  Backup size 425.73 GB < (Disk used 156.86 GB X 3)
              Time Machine details may not be accurate.
              All volumes being backed up may not be listed.
    Top Processes by CPU:
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                   1%          WindowServer
                   0%          Skype
                   0%          fontd
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    Virtual Memory Information:
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              1.86 GB          Active RAM
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