On 10/26/2011 11:22 AM, David wrote: > Are there any obvious reasons why the chip would fail to leave MCLR? > I can live with power cycling the board to get it working, but it's a > bit of a pain. > > David I have had all sorts of odd issues when sharing any of the programming=20 pins with another device while doing programming. Sometimes I would have=20 to power cycle the board, sometimes I had to remove the programmer and=20 power cycle the board. In short I don't think it is a good idea to have anything on the=20 programming pins when developing. I install jumpers between any devices=20 that need to use those pins after programming . --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .