Date   : Sun, 18 Feb 2007 10:04:21 +0000 (GMT)
From   : info@... (Sprow)
Subject: Screen garbage and program crashes

In article <BAY114-F4624DEB90DEC0DF372F3AA08B0@...>,
   Richard Hobbis <rhobbis@...> wrote:
> Richard Hobbis wrote:
> >My 'new' Beeb appeared to work fine the first night I tried it, but now
> >it is having 'issues'.
>
> I tried changing the power supply because it was getting very hot.
> It seemed to work OK for the next half hour or so before I turned in for
> the night, leaving it on and running Repton.
> Next morning it had corrupted itself and the screen graphics were
> complete garbage.

> I'm thinking that there's a heat problem with one of the memory chips -
> does this sounds likely?
> Which chips should I try swapping out (hopefully they're socketed!)?

You could try swapping the 6845 CRTC for a known good one: it's responsible
for screen display AND the refresh of RAM, 
Sprow.