Date   : Fri, 20 May 2005 05:40:56 +0100
From   : Mike Tomlinson <mike@...>
Subject: Re: RAM chips for Model B

In article <1116474621.428c0cfdcc78d@...>, Michael Foot
<mjfoot@...> writes

>I've replaced the CRTC also, but it hasn't fixed it. So I'm thinking it could 
>be one of these issues:
>
>1) Faulty RAM.
>2) Faulty track(s) joining the RAM chips.
>3) Faulty 74LS51
>4) Faulty 74LS139

Faulty 81LS95 buffer(s).  Rare, but does happen.