Accidentally plugged 12V power to Mega Sensor Shield V2 (External Power)

Hi, I was working on a project that requires a lot of servo motors as well as current. So I bought Arduino Mega and a Mega sensor shield(http://a.co/9moZun6). Today I finished assembling everything, then I tried to connect the sensor shield to an 11.1V battery through the terminal block. My servo motors all went crazy a bit(I instantly unplugged the power). And When I was about to upload my code(tested before and works), my mega cannot be detected on my windows(win10) computer. The Arduino mega itself is working(Green power led and yellow “L” are on when plugged into my windows), but it just doesn’t show up as anything(COM) – my windows doesn’t even report there is a new or unknown device. I checked the cable and my windows with an Uno, they have no problem. I figure maybe a part of Mega is fried? Any idea? Anything I can do to fix it? (Any possibility of ATmega16u2 corruption?)

Besides that, my new mega is on its way with a voltage regulator(http://a.co/2PKFzDR) that will be connected to my sensor shield for external power.

Later today I also learned from the internet that the mega sensor external power does not have a 5V regulator, which is why my mega isn’t working now.

Hopefully I don’t find out that my servos are fried as well. Thanks if anyone can help.
(The attached is my project without the mega)

try device manager for connection issue, but sounds like its fried, could possible do a contnuity test on regulator.

Hi, Sorry, +12V on 5V for MEga probably fried alright...

You need to see the POWER JUMPER on the Mega Sensor Shield (INFO HERE)

Unless your servos work on 11V, you only want a high-current 5 to 6V supply connected there.

eddyman: try device manager for connection issue, but sounds like its fried, could possible do a contnuity test on regulator.

Thank you, I don't think the arduino is detected at all by my computer. It seems like it's fried, and my new arduino is working now

terryking228: Hi, Sorry, +12V on 5V for MEga probably fried alright...

You need to see the POWER JUMPER on the Mega Sensor Shield (INFO HERE)

Unless your servos work on 11V, you only want a high-current 5 to 6V supply connected there.

Thank you for the info page, my new arduino is working. And I'm currently trying figure out how the jumper for "PWR select" works. My robot is working only when both USB cable and external 11V power are connected. I figured that it might be the jumper's problem.

I'm currently trying figure out how the [Mega Sensor Shield] jumper for "PWR select" works.

The PWR Select jumper:

Jumper ON : The power pins (center pin of the 3-pin groups) comes from Arduino 5V Jumper OFF: The power pins (center pin of the 3-pin groups) comes from the Terminal Strip (Labelled External Power in the photo). You can supply things like 5 to 6V for standard servos, or other voltages, from an external power supply connected to the terminal strip Vcc and GND.

There is also an equivalent UNO sized shield you can see HERE