I have a powershot s400 canon camera, I just charged the battery and when I turned it on to take a picture the screen was all distorted. This happened before and then just fixed itself. This time it was longer. the camera is only about 2 years old.

Hi.

The distorted and blurred picture and often in false colors is probably caused by a defective CCD sensor. The CCD sensor is the light sensitive chip that captures the picture. This is located inside the camera body, right behind the lens.

CCD sensor is a common failure. Here a forum. Canon released a bulletin on the problem and was covering repair on models from several years. Here the forum, Canon removed the bulletins from Web. Conatact Canon to find out if you are entitled to repair.

There was also a firmware update for S400, but I don't think it will do anything about the problem.

Here support page.