What programmer would you suggest? I somehow doubt the programmer is the issue here, because it does the other chip fine. Is there any reason the programmer would work totally fine on one chip and not on another? -David -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Xiaofan Chen Sent: Friday, September 30, 2005 5:41 PM To: Microcontroller discussion list - Public. Subject: Re: [PIC] PICs won't flash? Try with a different programmer and then see if things get better. Measure the Vpp of your JDM. I still guess that Vpp control is the key here but I am just guessing. Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist