New Arduino Motor Shield Short Circuiting my board? I just got this today, plugged it in my arduino, and the arduino light starts dimming until you cannot see it any more over the course of 5 seconds. The Computer disconnects the arduino when the light is off (Ding Dong Sound). I found pulling the VIN Connector Jumper/Power Jumper will stop the short circuit and work, but that defeats the purpose, as the board wouldn't even powered. 

Here is the video:
YouTube

Is the motor board broken? If so in what way? are the wires on the board simply broken? Is it due to bad soldering?(I checked solder, looks fine).

Arduino Model: Arduino UNO by Elegoo
Motor Driver Model: L293D Driver Board
Ebay Listing For Item
(I tried using this with a MEGA also, would short it as well).
Thanks to @jwpat7, I have discovered that the reason it is not working is that the seller has messed up and sent me 3 of the same chip, 74HC595N. After doing some research, I have purchased the LM293D Chips.