Outdoor pictures give white display on screen
Go to the menus and reset to default or factory settings. Make sure that the white setting in the picture adjustments in the menus are set to zero or you may have to adjust + or - to get the normal effect again.
Test the camera by taking pictures and saving to a sd card. Then put the card in a card reader/writer which is connected to the computer. Copy the pictures or files to the computer and view them to see if they are in good shape or if there is some problem with exposure or the way it looks.
If the computer pictures show that they are good, and they are not showing good on the camera LCD, then the LCD has a problem, and is possibly either cracked or has some other display problem.
These LCD screens are not that hard to change if you are good at working with small items and screws. If you do this, make sure you have a way to remember where you got each screw, as they can vary in size and kind.