Logically, if it freezes at the Nokia screen it means something isn't right with the boot up (sort of like BIOS in PC). While I haven't experience it myself I have seen something similar like this on Windows many times. Sadly the only solution to it is using the Nokia Recovery Tool and re install the OS\Firmware, I do not know though if you lose all of your settings or not, if you do, I hope your last backup wasn't long ago.
It is not detecting my phone.
Pressing and holding the Power and Volume down keys doesn't make my phone to vibrate. Nothing is happening , I tried various key combinations ,even the one for "Hard Reset."