IMac video broken

Blank and white lines on screen after boot up of 2008, 24 inch iMAC. Tried removing power plug for >15 secs and rebooted, no improvement. Did get normal desktop after vacuuming vent and resetting SMC. Screen gets "fuzzy" after about three minutes of running. Also tried to reboot with no devices connected, but this did not help. Would like to know what the root cause is most likely to be. If anyone has an idea please let me know, thank you.

Read in your owners manual about how to run Apple Hardware Test, run it in Extended Mode. If no errors appear after the first pass (30-60 minutes) then run it another 2-3 times. If you get an error, the next stop is an Apple Store or AASP for repair.

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http://www.apple.com/imac/
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I want to thank everyone in advance for posting here.
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Hello,
I want to thank everyone in advance for posting
here.
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be doing the video card upgrade regardless of which
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Intelimac.org/vids/unpack.mov
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http://static.flickr.com/86/24719817125803f01fao.jpg
http://static.flickr.com/97/247198169f81ddba5f8o.jpg
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Hello and Welcome to Apple Discussions.
Unfortunately no iMac offers any kind of video input out of the box. There are Firewire and USB2.0 video-input devices which are good value but probably won't offer the kind of spec/quality that you will want to input HD DVDs for example.
Here's an example (link). There are HD tuners available too.
BTW, Apple stopped selling iMac G5s back in January of 2006. The current iMacs are termed "Intel iMacs".
kind regards
mrtotes
Message was edited by: mrtotes

IMac video broken

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