Thomas, Just a shot in the dark, but what happens if you swap the two chips? Will only one still ID? That'd give you a pretty good indication there's something wrong on the board. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams On Thu, 24 Jun 2004 06:33:36 -0400, Thomas C. Sefranek wrote: > > I have a test board with two PIC18F452s. > Each has the plug for the ICD2. > At first only one of the 452's would correctly ID. > I found a shorted PC trace on the other, and it ID's and programs correctly. > Now the 452 which did ID doesn't... > I suspected a similar trace failure... nothing, and it measures fine. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu