Strange Pixhawk startup sound copter

After purchasing Pixhawk4 and installing the firmware for Copter 4.0.7, the strange sound started.

The normal start tone plays intermittently after connecting the power several times.

What’s the problem?

Can I use it normally?

Video

Instead of :

It makes a :

I think this has something to do with the MircoSD card. Can you try using another microSD card? Also check that your new microSD card is compatible with Pixhawk.

And install ArduCopter 4.1.5

There is a reason you should use 4.0.7.

And what would that reason be?

I will install 4.1.5 and check if it works properly.

However, the condition presented to me is to build a drone using 4.0.7.

I would suggest changing the condition to “current stable version”.