No display on TV but has Sound and can play content

Hi, I have a Samsung OLED TV model: QN77S90CDFXZA. The TV boots fine and I can hear sound and TV menus being switched however there is no display on TV (Tried flash light no display). Tried replacing the display, power supply, TCON and Main board still issue persist. Would it be the connectors?

I am specially thinking its either the flat ribbon cable from Main board to TCON or the PSU to TCON power cable

Also I found the TCON and mainboard flat cable, would anyone help me with the part number for PSU to TCON power cable?