When I turn my camera on I get a black screen and can't take a picture. what is the matter?

When you transfer this pics at pc... they are black too? Could be a problem with the LCD screen viewer or CCD Image sensor go to bad. In both cases this isn't a job that you could solve yourself; this wrong include distorted images or abnormal colors, scratchy purple lines, blank or black pictures, and/or black videos with good sound being recorded on the camera's flash card.

I suggest check THIS LINK for additional details in this previous solutions for an Defective CCD (Charge Coupled Device) and next contact your Olympus service. I strongly suggest (taking into consideration the age of your camera) to evaluate the cost of repair versus the cost of a new camera with similar features, before making a final desicion.

Hope this helps.