Pixhawk Cube not being recognized by Mission Planner

Good Evening Everyone,

I am facing a issue with my Pixhawk black cube. Every time I try connecting it to Mission Planner, first solid red light emits then red light blinks. Afterwards red blinking light stops but solid red light red light remains. Can anyone help me with this issue?

Good evening Doctor,

I had a trouble with a pixhawk once that was not able to connect with MP, but I do not remember which was the behaviour regarding the lights… but I solved the problem by updating the bootloader of it and then flashing a new vehicle stable firmware. Try this and see if the problem disappears.