Hi Magu,

This the reason why we are testing with this LED 1 blink program.
With this program you can verify if the PIC and its 10 MHz crystal oscillator work.

Try that: (In order)

- On the socket of IC1 solder a 100nF capacitor between the pin 14 (VDD) and pin 5 (GND).
(You should already have one close to the PIC, solder a second one on the above pins).

- Test if the LED 1 blinks.

- Replace the two 22pF capacitors.

- Test if the LED 1 blinks.

- Replace the 10 MHz crystal.

- Test if the LED 1 blinks.

- Replace the PIC. (Program a new PIC with MBLINK.HEX).

- Test if the LED 1 blinks.

- Use a different +5V power supply. (Make one with a voltage regulator 7805).

- Test if the LED 1 blinks.

* * *

When you program the PIC with the program IC Prog follow the steps visible in picture below:

Do not modify the fuses which are automatically set by the file MBLINK.HEX.



The PIC is programmed OK only if the VERIFY step is successful!

Best regards,

Luciano