Pixhawk4 FMU V5

Hello i need help to download ardupilot firmware for my pixhawk4 …i tried few times upload the firmware at QGC but its not working even tried at ardupilot after update the firmware error beeping pop up error msg IO missing …tq

Download the .apj file from here and use Mission Planners “load custom firmware” to select it.
Pixhawk4 firmware

tq friend i had done this too b4 same