VR10M703BWG/SB is turning off immediately after it leaves charger

Vacuum cleaner robot shuts down after it leaves chager spot. It doesn’t matter or it is fully charged or half. To turn it on I can just putting it on charger by hands. It seems then charger pins are connected with robot it is ok, but immediately it goes off charger power supply disapprears. Plus there is weard silent sound after it shuts down (like electrical noise working inside robot). Any ideas how to fix it?