I just turne on my camera and the screen is black

you can go to the service center may be your display is not working properly

sdadgynklj

..I have the same problem. Have no idea why . Now I cant get the movies onto the quickflix screen to download . Might have just got ripped off . Was toooooo cheap . Next time Im investing in a more expensive camera!....Lisa

tyr to factory reset device on advance settings
with out the memory card

From camerahacker.com:
1. Hold camera firmly in left hand.
2. Smartly rap front of camera with knuckles of right hand on the "Cyber-shot" logo.
Worked for me :)
// Maxim

Usually it's an lcd burn out where the screen needs replacement. Check the display button if it's just blank then press it to see if it comes on. As far as your friends white screen it not feasible to repair. A good thing to get on any digital equipment is an extended warranty. It does save you in the end when something goes wrong. The limited manufacture warranties are a joke. You should never rely on them.

the warranty wont cover the screen they will tell you its your fault and they wont do anything.

What is the camera model?

This sounds like it might be a defective CCD imager. If so, Fuji should fix this for you for free. This is regardless of your camera's warranty status. Please check the following two links for more info:

http://camerarepair.blogspot.com/2007/12/fuji-digital-cameras-showing-black.html

http://www.fujifilmusa.com/JSP/fuji/epartners/ServiceSupportProductContent.jsp?dbid=839010&prodcat=2147483647&sscucatid=664262&quicklink=true

Applicable cameras include:
F303, F410, and F700

Your camera has a defective CCD imager. Please return the camera to Canon in New Jersey and they will replace the CCD at no charge to you. This is a known issue and should be covered under extended warranty. Good luck my friend. Joe Weibel customelectronics.org