SXT update to 6.42.7 is not Work!!!

Hello
My Device is Mikrotik SXT 5nD r2 version 6.39

I wanted to update the Router to Version 6.42.7

I downloaded the firmware 6.42.7 and uploaded it to File and After that I restarted the device.
But unfortunately the device does not boot and does not work, boot up, then turn off and on again and boot up and off.
NetInstall software does not recognize it because the network card is also active and disabled.
I’ve also done the hardware button, but it does not work again, it turns off and on.

Reset Button : https://pasteboard.co/HBKB35V.jpg

Please help me, the other device can not work.
mikrotik-SXT.zip (441 KB)

When doing netinstall, put a switch between the device and PC.. That will work…