correct power supply was the problem
i order the whole kit, power adapter 5V 3A O-PI plus 2 board with case
after having too much discussion with seller on aliexpress i came to know that the power adapter is totally dead,

they have sent me the dead adapter.
I have to buy another powersupply and now board is correctly working.
but there is a question on the quality control there that they dont even test it before sending