Date   : Tue, 30 Jun 1998 19:20:57 +0100
From   : Crispin Boylan <viewtronix@...>
Subject: Re: BBC Micro Display Problems

Hi

At 13:42 30/06/98 EDT, you wrote:
>Both are Issue 4 BBC's but in typical fashion the one of them has the chip
>soldered to the motherboard.  
>
You can unsolder these chips, but it is difficult.  The best thing to do
would be to unsolder it (difficult if you don't want it to break) and put a
socket in, then put a new SA5050 in.

>Also does anyone know why the one of the chips in IC6 is made by Ferranti
>while the one in the other computer is made by Acorn.
>
That is the Video Processor I think, it was redesigned by Acorn, because
the Ferranti one was unreliable and overheated, so it needed a heat sink
on.  The Acorn one does not need a heat sink, but it does no harm to have one.

Cheers.
Cris.