across c3 I'm getting 4.6 volts... Anything else to check? I'm assuming this means I need to change out that chip...

Walked in to check on printer and noticed screen was black. The touch screen still beeps if pressed in certain places but no backlight or lcd (when using flashlight). It has been in a case since install (september 2019). I did try reinstall using bossa with no issues except the screen still being off? Looking inside the case, I see no physical component damage. Any ideas or is there a way to get warranty replacement?