Question ASRock A320M-HDV R3 KO after update BIOS

[MistizioFriend]

This morning I wanted to update the BIOS. The installed version was 3.6 and the latest version was 7.4. The version after 3.6 was 7, and in order to install 7.4 it was necessary to first install 7 as requested by the manufacturer. Once version 7 was installed, there were no problems and the PC started correctly. During the installation of version 7.4, there were no problems either, but now the PC won't start. Only the fans turn on and there is no power even to the USB ports. It's dead. Is there a solution? Thank you.

 

[helpstar]

which CPU are you using?

reset the BIOS by jumper

 

[MistizioFriend]

The processor is an AMD A series A10-9700.
I have already tried resetting it via jumper (clearing CMOS) and by removing the battery, but it still isn't working.
Versions 7 and 7.4 of the BIOS supported the same processors, and the PC started correctly with version 7.