Date   : Tue, 30 Jun 1998 10:38:47 +0100
From   : andy.fox@... (Andrew Fox - Sun UK - Support Engineer)
Subject: Re: BBC Micro Display Problems

Hi Gary,

> I've dug my two BBC Micro's out, one is well beyond repair, the other will not
> display a Mode 7 screen properly, the screen is just a collection of bits of
> white on the TV (I don't have a monitor).  The other modes all work fine.  I
> can salvage roms out of my other BBC. If anyone has any suggestions as to what
> to do then I would be most grateful.  Also if anyone has an Acorn DFS ROM they
> don't want then please let me know as I've snapped two of the legs on mine.

Try pulling the SA5050 teletext IC from your dead beeb, and put it
in the semi-working one.

The SA5050 is the chip responsible for generating the mode 7 screen, so
would seem most likely to be at fault.

Depending on the issue of the beebs, you may find that this chip is
soldered in, in which case changing it may be more of a problem.

Andy.