Vertical Lines on parts of display, and display shuts off at random
I checked other posts on ifixit for this, but none seem specific enough to my issue.
My parents have an iMac G5 Model A1144, last three digits of the serial number - TAQ).
It has had very little use other than browser and AOL, since new. They are getting faint vertical lines in parts of the screen (not limited to one area, but mostly in the center and seems to match the pattern of whatever is on screen, like the wallpaper). Also, the screen goes black for a few seconds, randomly, and then comes back a few seconds later. This is with no software running or with maybe the browser running as well.
They do nothing at all taxing on the machine, and their home is so clean it's like a clean room, so I would even rule out dust as a possibility; the bottom vent doesn't even have a speck on it.
Any ideas, folks? Thank you!