I've a Sony DSC-F828. Every time I use the camera, I get the following problem after several shots. I get either: 

- A striped image which is overexposed even if I use a very short exposure time (ref. image 1)  ![Image 1:A roe deer with a damaged camera][1]

Or: 

- A predominant black image with strange colors, as if a "neon filter" is applied:
![Young man planting radicchi in the garden with damaged camera][2].  

I don't understand the cause and the origin of this problem. These are the main observations I've done:

 - It appears after use
 - Shutting down the camera doesn't solve the problem 
 - After taking a photo the image shown in the LCD is affected by this problem (so that excludes a problem related to the CF).
 - The first time it appeared was some time after I shot the sun through some leaves (?).

 Update:
 - It is related with my zoom when I zoom over a certian extent I've got this problem

  [1]: https://i.sstatic.net/Vr2ID.jpg
  [2]: https://i.sstatic.net/QbDPg.jpg