You have loaded not only incorrect firmware but also an incorrect bootloader for which was specifically written to NOT load it on any other brand than the mentioned ones.
I have no idea how to fix your device after this action.

 

Hello I got a problem with my Olympia 300. I found this page and its content not that long ago. I downloaded a firmware from the [Files] section on this website because there was Olympia 300 on the picture in the download section. The problem is my screen went upside down it says iRadio while booting and I can see 3 buttons to choose from.

How can I restore the old firmware?
The device doesn't recognize the remote and even if touchscreen works I can't get to the menu.

Sincerely,
Josh.