The PIC does not start its program.

[skimask]

Get back to basics...
For on thing...

.......DEVICE statements, PIC Setup statements etc.
All LEDs are set OFF
All LEDs are set ON
Wait for 1/2 second
Turn all LEDs all

It runs one time, and one time only. Don'tcha think it would be better to continuously blink the LEDs so you have time to probe around and see what's going on?

@ DEVICE MCLR_OFF
@ DEVICE hs_osc
@ DEVICE wdt_off
@ DEVICE lvp_off
@ DEVICE protect_off
Define OSC 20
INTCON = 0 : CMCON = 7 : TRISB = %00100100 : TRISA = %11111100
LED_Kalib VAR PORTB.7 : LED_Halb VAR PORTB.4 : LED_Voll VAR PORTB.6
LED_Besch VAR PORTA.0 : LED_OK VAR PORTB.0
main: Low LED_Kalib : Low LED_Halb : Low LED_Voll : Low LED_Besch : Low LED_OK
pause 500
High LED_Kalib : High LED_Halb : High LED_Voll : High LED_Besch : High LED_OK
Pause 500
goto main
END

[Ted's]

Not right now, skimask.

The issue is that the pic is not even starting its programme.

I want to give you more information. When voltage is being applied to the circuitry, these levels are given on the pic's socket:

RA3 = Undefined, Floating
RA4,RA5,RB2,Vdd,RB5 = 5.01 Volts
RA7,RA7 = OSC

[skimask]

Not right now, skimask.
The issue is that the pic is not even starting its programme.
I want to give you more information. When voltage is being applied to the circuitry, these levels are given on the pic's socket:
RA3 = Undefined, Floating
RA4,RA5,RB2,Vdd,RB5 = 5.01 Volts
RA7,RA7 = OSC

That's EXACTLY the issue. If you break it down into it's simplest form, you can probe around, put parts in, pull parts out, play around, without worrying about anything.
And again, YOUR program only execute ONE TIME. Are you going to sit there and keep pressing RESET while you mess around trying to probe?

[Ted's]

Do you recommend soldering on a running system?

To me it is about what is given the first time when voltage is being applied. Or will it work if I replace the quarz while there is already voltage applied to vdd and vss? I doubt so.

[skimask]

Do you recommend soldering on a running system?

If it's only 5v and you've only got a PIC, an LED, a resistor, and the rest of the glue that goes with, sure...why not?

[Ted's]

It is not. Just look at the voltage levels being applied. There need to be outside devices which apply the voltage to the pic.

skimask, the main issue is that the device is not starting. I want to solely focus on that.

I know four main error sources: The pic's hardware, the pic's software, the quarz and voltage applied to vdd and vss.

Right now I suspect the quarz to be faulty.

[skimask]

It is not. Just look at the voltage levels being applied. There need to be outside devices which apply the voltage to the pic.
skimask, the main issue is that the device is not starting. I want to solely focus on that.
I know four main error sources: The pic's hardware, the pic's software, the quarz and voltage applied to vdd and vss.
Right now I suspect the quarz to be faulty.

Ok, fine. Let us know what you did to troubleshoot the problem and what you did to fix it.