Tried that, unfortunately after digging down to problem further it looks like D13 zener diode broke (9V on both sides as if there is no diode at all)?
I have made regulator mod. That worked nicely, i have now proper 5V where they belong but console has still same issue. When game is inserted "partially" it shows INSERT GAME and when fully inserted, just empty screen and no sound. So i dare to say that zener did let 9V to 5V rail and some of the chips inside metal cover died as a result ?