PIC stop responding - Strange Problem!

[financecatalyst]

The leds are shown the wrong way. If this is how you have them connected, they will not light up. But, this is a minor issue

Check your power supply. Remove the PIC and force both relays to on via jumpers. In this condition, what is the supply voltage to the input/output of the 78L05? Is the PIC Vdd being satisfied?

You do not have a decoupling cap across the PIC Vdd-Vss.

Thanks for thr reply Jerson. After I switch all 4 relays on, 78L05 input/output is left with 10.9V, still having 5V for PIC.

Should I increase the resistance for the LEDs as well?

[aratti]

Tray adding the two capacitors and one diode as per the attached schematics.

It should cure the problem.

Al.