Date   : Fri, 28 Jun 1996 14:09:32 +0100
From   : "steve" <steve@...>
Subject: Re: Hardware problems

I think I'm making progress.  If I run Mike's little soak test program,
after about 10 minutes, the machine locks up, sometimes with corruptions
on the screen.  If I run with the lid on, it locks up more quickly, say
two minutes.  If I remove the heat sink from the ULA, it happens almost
instantly.  Does this indicate that the problem is the ULA overheating? 
Do I need to get some more of this white gunk to fix the heatsink on
properly?
.
> 
> Nitpick: video processors (VTi chips) don't use heatsinks, only the
original
> Ferranti ULAs.
 
What's the difference?  Is the VTi better?  One of the spare boards I've
got appears to have a VTi chip on.  IC6 has "VTi" in fancy lettering, and
"417 V 2472   VC 2069   201647  (c)Acorn Computer  KOREA-AE".  Should I
try swapping this for the ULA in my board?

Steve