4 Replies Latest reply: Jul 18, 2012 12:43 PM by Kenichi Watanabe
carogro Level 1 (0 points)

Recently my iMac 17"/1.83 GHz with a ATI Radeon X1600 started showing sort of duplicated images making it impossible to use. Can the video card be replaced? Or is it integrated to motherboard.?


I was able to acces to the info conecting it via Ethernet to another imac, so i guess it is a problem with viedo card.

iMac, Mac OS X (10.4.7)
  • Kappy Level 10 (265,934 points)

    It's integrated onto the motherboard.

  • Kenichi Watanabe Level 7 (33,007 points)

    Can you explain what "duplicated images" means in more detail?  It does not sound like a failure that graphics hardware or LCD would sustain.


    If you can used it in some capacity, go to System Preferences Universal Access pane Seeing tab, and make sure it is not one of those settings that got enabled by mistake.


    If you can, also enable "Screen Sharing" in System Preferences Sharing pane.  Then, from that other Mac that is connected via Ethernet, you may be able to "remote control" the Mac with the display issue and do some more troubleshooting.  To do this, on the "other" Mac, open a Finder window.  Find the iMac under SHARED (in the sidebar), and select it.  Over to the right, click the Share Screen button (and log in).  If it's a hardware issue, the iMac's screen should appear normal when viewed from the other Mac using Screen Sharing.  If it still looks messed up, then it's not a hardware issue but something related to software or settings.


    Another way to confim it's a hardware issue is to start up from your Mac OS X installation disc.  Insert disc and restart with the C key held down.  If it's a software or settings issue, it should look normal when starting up from a different system.  If it still looks messed up, then it is probably a hardware issue.

  • carogro Level 1 (0 points)

    Kenichi... In the first place, thanks for your interest.  I will try to  do has you say, and tell you, in case your interested, what finally was the problem.


    When I described what happend to the image, I was no accurate. Soppouse you just started your iMac. For a short it it performs normally, but all of a sudden, as you move the mouse arrow throw the screen, it seems as if the image of the finder would follow the arrow, leaving traces of it and pixelating the screen image.


    I'll keep you informed .


    Thanks again.

  • Kenichi Watanabe Level 7 (33,007 points)

    OK, that sounds more like a possible graphics hardware issue.


    If you have not already, reset PRAM




    and if that does not help, also reset SMC (power management)




    When you reconnect it to power, if you have been using a power strip of some type, try a direct connection to a wall outlet by itself (at least initially).  Power it up with nothing but the power cord connected, and add only standard keyboard and mouse.  Use it that way for a while to see if there is improvement.


    It might be related to heat, so inspect at the air intake vents along the bottom edge of the iMac to make sure there is no accumulation of dust blocking airflow.  That may be why the problem does not occur immediately, but starts to happen after a short time.