I tried to get one more DB410C and realized that its working fine with my power supply.
In fact this power-supply was provided to me by Arrow..
I dont have a serial adapter to take linux kernel boot images. Yesterday I had checked with Seed Studio and realized that the adapter board is not in stock.
If anyone assists me in a circuit diagram, I will try to assemble a small serial cable myself.
At least this device should work once.. so that I can enable ssh and continue working in a headless way.
Could you tell me how do I check if there is any power issue ?
Or is there any other way to debug this issue ?