After programming various chips, including "J" series, I tried another program with a "J" chip and everything seemed normal but the code failed to load? I can view the program space and it's blank. There was never any smell of a short or any other sign of failure. I would like to find a schematic to aid with the repair since I can't afford another programmer. I am unsure about the power supply layout for generating the programming voltage. L1 has a R of about 2 ohms and all the R's are good. Unsure about the little switching transistors. Any help will be appreciated since this has shut me down. Thanks JC.