Thanks for all the helpful posts about this topic:
The eMac I'm working on - for friends running a business which depends on their eMacs - sporadically displays
this same video problem and it falls within the range of the Serial Numbers which Apple quotes on the
eMac Repair Extension Program.
It's odd to see this as a hardware capacitor problem - as mentioned in various similar threads about this video corruption - rather than as a logic board or other display board problem, because it happens
specifically and repeatably when using
Word X for Mac and choosing Word's
Preferences from just beneath '
Word' at top-left of the screen.
The drop-down menu beneath the word '
Word' (where Preferences sits)
immediately corrupts - every time - as soon as I click on the word
Preferences ..and the eMac then freezes.
This
doesn't happen if I use the keyboard shortcut (Apple-key and comma ..⌘, ) for Word's Preferences, but only if I click on the actual word '
Preferences' itself.
..Whoops! ..Now that I've activated it using ⌘, the eMac continues to work OK if I do choose the word '
Preferences' from the drop-down menu..
Curiouser and curiouser..
We-e-ll, feel free to disregard this post ..except for the thanks to all those who've pointed out items to investigate in the previous posts in this thread. Thanks.
<..shakes head, goes for a walk, retires to bed..>
Needless to say, this eMac will be going back to Apple as soon as it's been cloned to another working one..