SV03 LCD screen failure 25 leveling points after firmware flashing

Hi everyone, happy to have 3D Sovol Printing pals!
I actually have my SV03 printer unable to function properly, after having flashed the new 25 points bed leveling firmware … the LCD screen emits blue light, but no indication, nor beeps every handle movement … it seems somehaw dead … I’ve used the cura to flash the firmware … I’ve also tried to downgrade the firmware back to the 16 bed levelling points firmware, with the same procedure, but I’ve not results. I’ve tried to identify the problem disassembling the LCD screen … do I solve changing the LCD screen at all? If so SOVOL can provide this pare part? Please gimmie an idea, a solution, or a suggestion!! Thanks in advance!