Ender 3 V3 bricked

Hello, I have a problem with my Ender 3 V3.
So I had some time off and didn’t turn on my printer, and didn’t update the firmware. I tried to start a print from a phone, but it didn’t start. Then I saw a 3000 error. After reading that this error was because of old firmware, I tried to update it, I saw that there were no new updates. I tried to downgrade to old firmware, and then update, but the printer bricked. Then I saw that there was flashing that firmware method through the motherboard, but after following all the instructions, the printer bricked even more, and now I see only a loading screen and a picture of some mountains, that I presume not supposed to see. Maybe someone no how to repair it, or I


just need a new motherboard. Thanks for replying.