Distorted images, "solarized" colors, or a completely white/black screen while audio still functions are classic signs of T-Con failure.
I'm looking for a PDF datasheet or circuit diagram for the . t-con mdk336v-0n pdf
(often have T-CON board documentation):
: Between -5V and -10V . Missing voltage results in a white screen. t-con mdk336v-0n pdf