Display only shows white screen Sony Cyber-shot DSC-W690

Hi, when I boot up the camera, the screen is only white. I can hear the cybershot sound, and everything seems to work fine (ive tried navigating through the menus and taking pictures, and seems to all save to SD card fine). I've tried things read online like pressing down on the screen, and also re-inserted the LCD's ribbon cable (though I'm not sure if this one is the right cable to reseat). Still the same problem. Anyone have any experience or solution? Thanks!

Edit: also found out it successfully dims after waiting a while. It feels everything is fine except for no colour on the screen.