On Mon, 18 Feb 2008 07:57:07 +0100 "wouter van ooijen" wrote: > The problems I had last year (mostly disappearing firmware, including > bootloader, in the 18F2550, might not be caused by ESD at all. But It > might be a good idea to try something... Bootloaders disappear all the time. Other firmware is more difficult, but one of the things to take care of (don't know in the F2550), is to disable low voltage programming. Else, some very innocent pulses on - which was it, RB4? - a pin can reprogram things easily. John -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist