I am having troubles programming the bootloader of my ATMEGA328P-PU chips. The chips I bought were from ebay. I am following instructions from here, and I have triple checked my wiring. I keep receiving the error message "avrdude: Yikes! Invalid device signature. Double check connections and try again, or use -F to override this check." There is no message about what the device signature is on the chip. Here are photos of the chip itself.