Control board testing failed

Hello. I just completed my Shruthi-1 from the kit up to the stage of control board testing. And something goes wrong here sadly.
When I connect power some random LED pattern blinks for a moment and goes off. First and fifth button lights up all the LEDs and any button turns them off. Nothing else is working.
Any suggestions about what I did wrong?
Thanks a lot.

Have you check you haven’t swapped the two logical ICs (74hcxxx)?

Oh, yeah. It was one of the first things i’ve checked.

Just in case it somehow matters: control board is powered from filter board and voltage is ok.
Maybe there is some points to check voltage or resistance on to localize the problem?

Solved, thank you.
Now there is a problem with filter board, I’ll make another tread for it.