LED A4 does not light?

[FLJ]

Hello,
I am new at Flowcode. I bought the PIC developpement board #3. I am able to programmed all the examples and I am able to test different PIC micro. I can simulate to turn ON each LED on port A and display any messages on the LCD display. The LED A4 never light up and the signal is always low on a scope.
The simulation shows that A4 should light up. Is there something that I don't do right?

Thank you for your help.

[STibor]

Hi!
The RA4 is generally open-drain output.
The LEDs and a resistor in the VDD-to RA4.

[FLJ]

Thank you.
...and what should I do? Do I have to add a pull up on the developpement bord?

[Benj]

Hello,

If your using the HP488 Dev board then you can add the pull up resistor (4.7K or 10K) between +V and RA4 using the screw terminals on the side of the Dev board.