Matrix _16f877 need help, please

[MINHLE]

hello Arrati,

yes I have 200 ohms resistors connected in serial with each input of the PIC to limit the current into the pic.

I guest some thing wrong, because when I use OHM meter to test the LEDs. at the two pins on the socket (removing the PIC out of the socket) every thing is ok! so the circuit is not open.

I try to figure out

thanks for your comment.

Minh le

[MINHLE]

hi every boDy,

I removed the two capacitors of the X-TAL OSCILLATOR then it works. i am sorry for long time not to post the reply