Flight Controllers Fc Has Issues

[D.O.G.]

Hey there. I have the omnibus F4V2 pro FC. I have no problems flashing the board but when I get to calibrating the esc in motor mode on betaflight, when I plug the battery in, the FC connects and disconnect repeatedly everytime. I even switch to the back up FC and the same thing happens. I'm clueless, so any ideas will be appreciated .

 

[Tony]

I would try a different USB cable. If you have a good magnifying glass, you could look at the solder joints from the USB plug to the board and if you have a steady hand, try to reflow them.

 

[D.O.G.]

Thanks Tony for your reply. I've tried changing USB cord, battery connection and even changing PDB in the 210, just in case but the same thing still happens. I've even set up the 180 and it's still does the same as the 210. Plug in the battery and doesn't work. Unplug the battery and it works fine. I'm running out of ideas. Thanks again for your suggestion.