SAT Vu+ Solo2 Decoder: Stuck on Black Hole 3.0.3 Logo - How to Restore Factory Settings?

Hello.
My problem is that my supposedly decent equipment, i.e. the SAT decoder, has hung up and nothing helps to run it.
Decoder with preloaded BlackHole 3.0.3. Everything worked beautifully if it wasn't for my attempts to correct the existing settings.
I didn't like the crust, then the picons. Overall, I got the topic and the equipment was working until it was turned off.
When turning on, it stops at the start page with the Black Hole logo and the words Starting gui. Nothing can move him.
I even tried to upload new software, but nothing works. Each time he gets up the same and hangs up after a while.
Is there maybe a button that would bring it back to factory settings?
I am asking for help because the family is pushing.

Moderated By Mirek Z.:

I have corrected the topic title, removed unnecessary / incorrect spaces before periods, commas and question mark. https://www.elektroda.pl/rtvforum/faq.php - p. 3.1.13, p. 3.1.15.

Insert the Pendriva on the back or front of the tuner because it is important.
Insert it backwards. Turn the tuner off and on again.
On the display, if you see (and I don't remember here) press the POWER button.

Thanks but unfortunately before I decided to ask for help, I went through all the possible options. I just wonder if there is sometimes a physical button to return to the factory settings, like in a router, or I can get a ftp connection through the Dreambox Center and how to change something in the software.

This is not possible, but it can connect to a telnet and by typing the appropriate command check what is starting and where the tuner stops.
I don't know what command it is, so don't ask, but commands are also available on the network.

As usual, in such situations the problem turned out to be simple to solve.
After entering OpenWebif from a browser, you need to reset Oscam.
Thanks