Re: sony cybershot problem
Dead display, eh? Afraid that ain't a do-it-yourself fix - nor is it a cheap one.
You should double-check all the controls, to be absolutely certain you don't simply have the display turned off. If that don't bring it back to life, then it's repair or replace time. It's likely that camera replacement would be cheaper than the repair.
What kills them? Dang near anything, actually. Quite common is physical impact - a simple light bump, just right, is sufficient. Another killer is Age - which you wouldn't think so at just 2-3 years, would you? But quite possible. Especially if the camera has been in storage a while, and subjected to hot or cold extremes.