Re: Weird Apple IIe display

[Michael J. Mahon <mjmahon@aol.com>]

Antoine Vignau <antoine.vignau@laposte.net> wrote:
> Hello There,
> Do you have any idea(s) why one of my Apple IIe (and not //e) displays
> characters the way it does (see
> https://picasaweb.google.com/104707687928913128396/WeirdAppleIIDisplay) ?
> 
> The IIe is connected to a monochrome monitor, the one for the Apple IIgs.
> 
> Thank you,
> antoine

The simplest answer is that the 4 bit line of the character generator ROM
is not connected, or the gate driving it is always outputting 0. 
 
Try reseating the character generator ROM. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon