Switch boots but lcd displays nothing, backlight,touch,buttons and firmware is working

hello, first post so sorry if done wrong, received 2 nintendo switches yesterday for repair (v2 and lite,v2 is on another thread)

according to the owner, the lite was being sold when after finishing formatting the screen went black and didn’t show anything anymore, the switch boots normally and is on the first boot (the red logo with the music), the touchscreen and everything else(buttons) works as well since the switch makes the usual noises, but doesn’t show anything on the lcd, the backlight is turned on, already swapped the motherboard with a working lite to check if lcd is damaged and the lcd is working as well

does anyone have any idea what it might be?