iMac (Summer 2000): Wavy or Flickering Picture on the Screen

Symptom
Video "shadow bars" cascade down the computer's screen, causing the picture to flicker or appear wavy.

Solution

If possible, move your iMac computer to a different location to see if the condition still exists. This eliminates the possibility of environmental interference coming from objects such as metal desks/shelves, fluorescent lights, stand-alone speakers or electrical appliances.

If your iMac still has this issue, please take it to an Apple Authorized Service Provider for repair.

Note: The parenthetical product description (Summer 2000) refers to the summer of the Northern Hemisphere.