[Help] Omnibus f4 solid red light when lipo plugged in

So yesterday I was able to get the drone flying for the first time! I flew 3 packs but when I went to plug in the 4th the xt60 ends started smoking and are now burnt. I plugged the fc in via usb to betaflight and everything is still working and it lights up fine. However, when I soldered new xt60’s to the end of the battery and the wires connecting to the FC only a solid red light comes on and nothing powers up. is my fc dead?

It’s probably the 5v reg has burnt out , if it has it will heat up wether you plug in the battery or usb