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Lately, my iMac monitor shows an annoying 'ripple' that is horizontal and evident when I scroll with my magic mouse. I have not run any diagnostic tests to see what reports might show, but I have run Disk Utility and AppleJack. No change. This 'ripple' moves down the screen slowly too. Any suggestions how to proceed? iMac - Leopard v10.5.8 Model Identifier: iMac7,1 Processor Name: Intel Core 2 Duo Processor Speed: 2 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 4 MB Memory: 4 GB Bus Speed: 800 MHz

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  • First, check the cord connecting the monitor to the graphics card.
  • Check the video card installed in a slot. Connect a different monitor if all is well, the problem is either the monitor or the computer power supply.
  • If not, then the problem of computer power supply or video card. There is another option - a bad installation of the components in the case and if the housing is metal, then maybe you have a short circuit to ground. Indicator screwdriver or multimeter will allow you to figure out a problem. Well, or you can be an indicator because you will have to pinch or beat current).

If you are not confident in their abilities are best left to professionals repair.

  • Use ferrite core cable.

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or add it:

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