I had the same problem, but I wasn't covering the eprom window and stray
light was affecting the electron flow or something that sounds just as
unlikely was happening.  When I covered the window, the problems went away.

Jc.

At 07:07 AM 10/27/99 +1000, you wrote:
>Had this when I started. I use pp by David Tait for serial programming on a
>home brew programmer- After I slowed the loading process it never happened
>again. Do not know how to do that with you board but try it out.
>Henk VK2GWK
>
>
>>I'm having a very strange problem when programming a
>>PIC14000. I have MPlab Ver 4.12.12 and a PICSTART Plus
>>version 2.01.00 running on NT4.0 SP3.  I'm using an eprom
>>version of the 14000 and when I program the chip even though
>>it verifies correctly, the chip will operate correctly about
>>every other time it is programmed.  I've tried another 14000
>>and the same thing happens.  When  the chip doesn't work it
>>sometimes is dead in the water when it powers up, but sometimes
>>the program will partially run.  Then when I erase and reprogram
>>with no changes to the code it will run perfectly.  Has anyone
>>experienced this type of problem or have any ideas on what is happening?
>>
>>I'm about to start using some OTP chips but am leery of the same thing
>>happening and I can't afford to lose half of my chips to this problem
>>
>>Any help is appreciated
>>
>>Roger
>
>