Re: ICD3 won't program or perform self test - PGC and PGD remain inactive
Ok, time to put my hand up and explain why this has failed to connect.
There was an intermittent solder joint on the MCLR line on the target board which was checking out ok when bussed out, but flexing of the board adding the connector was causing this to make and break.
Many thanks for all for your suggestions. Lesson learned the hard way!