# MCBL-00010 cable fail to connect FC v2

Source: https://forum.modalai.com/topic/4890/mcbl-00010-cable-fail-to-connect-fc-v2
Category: Flight Core and Legacy VOXL (https://forum.modalai.com/category/9/flight-core-and-legacy-voxl)
Tags: flight-core-v2
Posted: 2025-11-26 01:59:15 UTC by francis
Replies: 1 · Views: 1725

## francis · 2025-11-26 01:59:15 UTC

Hi, 

I follow the Flight Core v2 user guide to connect FC v2 Board to Notebook by MCBL-00010 cable but the FC v2 board cannot work and it cause the NB USB power protection.

I take some pictures as below:

Step1:

- Plug the MCBL-00010 cable to FC v2 board.
- Plug the Micro USB cable to MCBL-00010.
- Confirm NB USB Power is 5V. Ready to plug Micro USB Cable
![69eca9d1-f8b5-4503-b0bc-c6a68558ce80-image.png](https://forum.modalai.com/assets/uploads/files/1764122095915-69eca9d1-f8b5-4503-b0bc-c6a68558ce80-image.png) 

Step 2: Plug the Micro USB cable to NB
![da1bc5ff-8e43-4340-b0a7-da7262dc6acf-image.png](https://forum.modalai.com/assets/uploads/files/1764122138667-da1bc5ff-8e43-4340-b0a7-da7262dc6acf-image.png) 

Step 3: NB USB Power is protected
![dc2d1760-3a85-4576-a3ba-76562ae64a77-image.png](https://forum.modalai.com/assets/uploads/files/1764122152461-dc2d1760-3a85-4576-a3ba-76562ae64a77-image.png) 

Step 4: Remove USB Cable from NB
![8697150e-a7c3-4b82-a58f-5ce15ad1763d-image.png](https://forum.modalai.com/assets/uploads/files/1764122176680-8697150e-a7c3-4b82-a58f-5ce15ad1763d-image.png) 

Measure the FC v2 J3 Pin1 & Pin4 that both pins are opened.
I do not know why FC v2 will cause NB USB power be protected.

Do I miss something ?

## Reply by francis · 2025-11-27 05:48:42 UTC

I fix this issue.
switch the Pin1 & Pin4 of MCBL-00010 cable is OK