APM 2.8 powered by usb but not libo.
Please be more specific, what exactly are you asking?
APM 2.8 board is powered and calibrated by usb. But after connecting to the power module then plug in the battery it doesn’t work. No LED lights. Why?
I suggest you check the output of module with voltmeter to make sure it is not defect
I already checked and it’s working properly
In that case you might have an issue with the Flight Controler
You can use ESC power supply (5v) on motor output , try is it’s working or not then it’s working on this method so your power module are faulty (may-be)
Probably it’s running on this method