TS2094: iMac G5: Troubleshooting when there's no picture on the display

Learn about iMac G5: Troubleshooting when there's no picture on the display
JG22345
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Q: my iMac G5 (ambient light sensor) display is completely black when I start up the computer exept ou can hear hard drive and fans and chime. how do i fix it?

Hi my iMac G5 (ambient light sensor) display is black when i turn it on you can still hear startup chime and fans but no picture. Ive checked the inside and everything looks fine even the capacitors. plz help thx.

iMac, Mac OS 9.2.x

Posted on Jun 30, 2013 9:08 PM

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JG22345

Q: my iMac G5 (ambient light sensor) display is completely black when I start up the computer exept ou can hear hard drive and fans a ... more

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  • by rccharles,

    rccharles rccharles Jul 19, 2013 8:00 AM in response to Jaya7
    Level 6 (8,486 points)
    Classic Mac OS
    Jul 19, 2013 8:00 AM in response to Jaya7

    has recently started getting the "colored vertical line" syndrome.  Of the 8 or 9 lines on the screen at start up, all but one seem to go away after a couple of minutes.  One just sticks on the screen. Not obtrusive, but annoying.  Thanks for the checking process - I'll see if it is the video chip.

     

    I thought you could not get video on the machine?  Did that go away?  Are you running in safe mode?

     

    Not related (?) I recently installed more RAM (this is now a "daily driver" machine for me), yet the hard drive is constantly spinning like it is using virtual memory.  I have 2 GB total memory -- 800 MB free and another 800 MB inactive at the moment -- with 80 GB free on the hard drive. 

     

    Adding memory did help.  I'm not sure ???

     

    I upgraded RAM from 512 to 2 GB to get rid of this spinning, but no luck (though processing is now MUCH FASTER).  Even with very little CPU usage (Safari at 6% is the most right now) I still have the hard drive whine most all the time.

     

    Is this normal and if not, what can I do to stop / fix it?  I checked around on the user support but couldn't find a reference to this specific problem.

     

    I'd say no.

     

    What apps is this occuring in?   The beach ball means the app is waiting for something.  Usually, it's  not enough processing time. Could be bad reads from hd. You can set activity monitor to show how much processing time your machine is using.

     

    beach ball

    "This could indicate that the application was in an infinite loop, or just performing a lengthy operation and ignoring event"

    http://en.wikipedia.org/wiki/Spinning_pinwheel

     

    lots of things to look at.

    http://www.thexlab.com/faqs/sbbod.html

     

     

    --------------------------------------------------------------

     

    Run disk utility.  verify filesystem.  repair permissions.

     

    Might be worth a re-install.

     

    Restore Tiger 10.4 & Leopard 10.5  DVDs are available from Apple by calling 800-767-2775 as of January 20, 2013. Have your serial number ready. Have your credit card ready too.  There is a small fee.

    https://discussions.apple.com/thread/4720126?tstart=0

     

     

    Robert

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