Results 1 to 5 of 5
  1. #1


    Member Since
    Mar 07, 2010
    Posts
    5
    iMac G5 20" - Video Card?
    The screen has multiple color lines and it won't get past the pin wheel screen. The best way to describe it is, it looks snowy like the racing ants you see on cable TV when you do not have the channel, but with color.

    Does this sound like the video card? Or could it be a capacitor issue?

    As is, is there any way to salvage whats on the HD? I'll probably just go buy a new iMac, since this one is 6 years old, but I got to get some stuff off the hard drive. Any ideas?

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,024
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    Salvaging the data from the hard drive is the easy part. Just buy an external carrier or adapter and you can then attach your G5 hard drive to the new computer to extract data as needed. An adapter like this one sold by OWC works best.

    The symptoms you described regarding the color snow on the screen could be related to various hardware problems: video card, logic board, video cabling, and so forth. Start with the video card as that's the easiest to replace. Look for swollen capacitors, frayed or broken cables.

  3. #3


    Member Since
    Mar 07, 2010
    Posts
    5
    I looked up "how to test the video card" and it was suggested to first try:
    Reboot, hold option, command, p, r

    I did that, and got the same issue at the pin wheel screen (see below).

    But then, I tried to restart, held shift to boot into safe mode and got the same screen. I let it sit there for awhile, while I searched the web on my PC, and bam, it loads into safe mode without any distortion.

    Any idea what it could be?

    IMG_4950.JPG Picture - Random

  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Fort Worth, Texas
    Posts
    48,024
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, El Capitan
    That definitely looks like Winter Time in Maine. Most likely a flaky video card is causing that to happen. Remove the video card and reseat it a few times. Could be some dirty contacts (if you're lucky). But like I said above it could be related to other defects also. The fact that it worked OK in safe mode after a while really doesn't help to determine the cause.

  5. #5

    MacDude121's Avatar
    Member Since
    Sep 22, 2010
    Posts
    1,426
    Specs:
    Black MacBook 2.2GHz C2D, 4GB Ram - iMac G4 700MHz, 512MB Ram
    Quote Originally Posted by chscag View Post
    That definitely looks like Winter Time in Maine. Most likely a flaky video card is causing that to happen. Remove the video card and reseat it a few times. Could be some dirty contacts (if you're lucky). But like I said above it could be related to other defects also. The fact that it worked OK in safe mode after a while really doesn't help to determine the cause.
    Hmm, I don't know. Up here you see WHITE. Especially in the middle of a blizzard with 3 feet of snow already on the ground. But I agree, to me it seems that the video card would be the culprit. I'm pretty sure something is dead/dying though, since it booted into safe mode once.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. The "new" imac video card
    By Skytour in forum Apple Desktops
    Replies: 3
    Last Post: 10-19-2011, 12:32 PM
  2. iMac 24" Video card replacement??
    By Victor2112 in forum Apple Desktops
    Replies: 5
    Last Post: 12-19-2010, 09:14 PM
  3. New 27" iMac's video card...
    By oddtimer in forum Apple Desktops
    Replies: 2
    Last Post: 10-28-2009, 02:50 PM
  4. Video Card Failing on iMac 20" G5?
    By spiffydave in forum Apple Desktops
    Replies: 0
    Last Post: 10-21-2009, 07:00 PM
  5. 09 iMac 24" video card question
    By Brows in forum Apple Desktops
    Replies: 3
    Last Post: 05-18-2009, 05:09 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •