DAF periodic won't start?

Hello everyone. I have a serious issue and maybe someone of you will know how to fix this.
So the problem -
In like 3 times of 10 when i start the engine -
it shows up a random warning and the engine won't start.
It's turning starter, but it just won't start.
As i have these random messages popping up i am thinking that problem might be connected with the main computer, but i am not sure about how can i test it IF i can. I asked other people and some of them suggested that solution might be some damaged wires,
but i personally think that it does not explain a RANDOM error.
So - if anyone has an idea - please let me know.
Thanks for support

p.s. Sorry about my english