Dear Sidratul Farnaz,
Firstly, you should determine whether the motherboard is genuine or counterfeit. If it is genuine, try testing your power supply on another desktop computer to ensure it is functioning correctly. Next, check the power input of the motherboard from the beginning to the end of the line. If everything appears to be in order, proceed to check your processor (CPU), RAM, graphics card, and hard drive. When disconnecting these components, be sure to inspect the ports for any potential issues. It is also possible that the problem lies with the port or socket.