Thanks for reply. Screen remained dark. Tried keys as well. no response. Tried Tesla technical support as well. They tried to connect car from remotely but not successful. Tesla technical support offered me to Tow vehicle to service center. I asked them about possibility to send technician to my place. They ask to contact again on Monday. After few hours I received message on my mobile that tesla has waked up. And then Tesla 3 was normal. I still don't know the reason. I will contact Tesla tomorrow to discuss reason.
Thanks
Jillani