Re[2]: VECTOR: Star Wars CPU D3 short

-----Original Message-----
From: "Mark Hooks" <[email protected]>
To: <[email protected]>
Date: Wed, 8 Jun 2005 21:19:36 -0400
Subject: Re: VECTOR: Star Wars CPU D3 short

> Matt,
> 
> Thanks for the suggestions.  The short reads 1.1 to 1.2 ohms between D3 and the ground buss.  It seems to be the same at most any location.  I even tried measuring differences in voltage with the board running but had no success narrowing it down.  I also tried the hot chip search and everything is running cool except for the vector PROMs.  I've tested them in a good board so I know that they are not the problem.
> 
> Unless someone has some other ideas I'm going to cut the D3 line on each chip until I track down which one is causing the short.  I just hope there isn't some hidden solder short because clipping connections won't find that.  
> 

replace the data buffer between the bus and cpu, it fixes a lot of games.