Hello, Recently SONY released the following notice in it's website. If you have the similar problem you are lucky. Sony repair it for free of cost including free shipping.

---Notice from SONY

It has recently come to our attention that a limited number of products, manufactured prior to March 2004, that incorporate a certain type of image sensor device (CCD) may exhibit the following:

When the product is used in camera mode, the LCD panel and/or electronic viewfinder exhibits either a distorted image or no image at all.
We have determined that this only occurs in a limited number of devices, but may be accelerated if they are exposed to hot and humid environments.

From October 3, 2005 through October 2, 2007, Sony will repair, free of charge, affected products exhibiting the above-mentioned problem where it is caused by the image sensor device. Sony will also cover the cost of shipping and handling to service to correct this issue.

Please contact the Sony Customer Information Services Center for further assistance at 1-866-703-7669.