Date   : Tue, 16 Oct 2007 00:43:59 +0100
From   : pete@... (Pete Turnbull)
Subject: Video ULA compatibility query

On 16/10/2007 00:24, Daniel Beardsmore wrote:
> Pete Turnbull wrote:
>> On 15/10/2007 23:22, Daniel Beardsmore wrote:
>>> I imagine most Beeb fans will be aware that the original Ferranti video ULAs
>>> on the Issue 4 and earlier would cook themselves and end up displaying all
>>> sorts of weird visual defects

>> Yes, they're supposed to have a heat sink -- and with that, they're OK 
>> (until the white gooey heat sink compound dries out or oozes away, and 
>> needs replaced).
> 
> Nah, all mine had the heatink plus the compound, still sticky. As far as I
> can tell, the chip just burns out anyway. Pretty sad really -- I've only
> ever had two Issue 4s still with a working ULA :P Ever.

It's not especially common, but it did happen -- usually because at some 
time the heatsink fell off or was knocked off and then the ULA cooked.

-- 
Pete                                           Peter Turnbull
                                               Network Manager
                                               University of York