Question about Apple iMac 233Mhz/333Mhz Power Supply (Rev A) (p/n 661-2081) Power Supply

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IMac 233MHz Screen constantly refreshes

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  • gonnagitsum Mar 13, 2008

    Thanks for the info but I think it's more hardware as I've not loaded anything in over a year - was sitting in storage for almost a year

  • gonnagitsum Mar 14, 2008

    The screen does turn off and on - will be on an application, the screen will go black, then come back on - does this every couple of minutes - annoying as hell, but doesn't skip a beat running the application. Could be dust, could be the flyback transformer, could be the analogue board but will hope it just needs a good cleaning.
    I've never cracked the case on my iMac but have built a few custom PC's and seen my iMac apart in the shop so it can't be rocket science!

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  • 13 Answers

Could be a software problem.

Posted on Mar 13, 2008

  • brusi Mar 13, 2008

    Well than in that case I don't think that the screen is refreshing it might be turning off & on!
    I suggest to clean out all the hardware from dust and dry it out in case of moisture.

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1 Answer

Screen is flickering constantly and goes black after a while


Look for your computer's monitor settings, then adjust its refresh rate.
To modify a refresh rate on Windows, right-click anywhere on the Windows desktop.
Select "Properties," then choose the "Display Properties" tab on the window that appears.

Click the "Settings" option, then select "Advanced" from the window that appears.
Choose the "Monitor" tab, which lets you access a drop-down menu with the options for refresh settings adjustments. As a basic guide, use a setting of at least 75 hertz.

Confirm the change by clicking "Apply." Reboot the PC to ensure the new settings on the screen take effect.
Check your screen if the blinking problem is resolved. If not, try a higher refresh setting. If there is no change on the flickering of the screen, this means the problem is not caused by the screen's refresh rate. If your computer is not running on a battery or surge protector, shut it down to safely transfer the plug to another outlet Hope this helps.

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Sir,
The iMac G5 and iMac G5 (Ambient Light Sensor) computers have a video out port located on the back of the computer, which will mirror video. Video mirroring means you can see the same image that is on the iMac G5's flat-panel display on an external monitor, television, or projector.
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Thanks
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1 Answer

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