My Nikon Coolpix 8700 is malfunction again July 31 2009

The symptom is that scanning lines on the photo makes it unclear.
It happened on Friday, July 31 2009.
I send it to Nikon Service Center on Monday August 3 2009.
Reference :
My Nikon Coolpix 8700 is malfunction :
?

I retrieved the camera on August 20 2009.
Total charge is HK$ 618.Cam unit is replaced.