I can see just a logo on ma moto v3i's external screen

Remove the battery, wait ten minutes and put it back.

Try also removing the sim, try a different one if you have it.

If you have a memory card start it without the card inside.

Try also the following procedure:
"press and hold the * # andpower button all at the same time until you see text come up on thescreen. If you get the text on the screen, pull the battery out, pressthe power button three or four times to discharge the phone completelyand then try the battery again and hold the power button for 8 secondsor until the blue in the kaypad gives a slight flash dim"
from HowardForums


Check also here
Motorola v3m razr has frozen up - FixYa

If it still does not start it is faulty, take it to a repair shop.