Hi Pat,
Here is my story with my K20D. Bought it a couple of weeks before leaving on an overseas trip. Barely enough time to familiarise,
Anyway, a few days into the trip I turn the camera off and the battery symbol stays alive in the top screen.....and it wont turn back on.
After much consternation and fiddling I dropped the battery out & in and away it went. This became the norm.
On returning to Australia I took the camera in to the Pentax people, some 90 minutes drive away.
The camera was returned and powered on/off as it should.
Yeay.
....then I took a couple of test shots....
only to discover a verticle stripe down the left side of the image....more shots....more stripes.....sob! sob!
So, back in the car the next morning and off we go again. Fortuneatly the nights sleep & the drive calmed me down a bit. According to the service report, the main circuit board was initially replaced but the sensor was not properly aligned (thus the second return) which is a human error fault on the part of the techy.
Hands up the perfect one(s) amongst us..???
Anyway, to finish it, the camera has worked like a charm ever since. I wonder if you are better off getting the original problem fixed rather than replacing the camera...because you may only be replacing one problem with another.
For the record, our family has bought a DS, two DL's, a K200 & K20. One DL died in questionable circumstances on a snow field, so I am not blaming the camera for that and all the others are going strong.
Mate its never nice to have something go wrong, but I do think you are better off to get it repaired, not replaced.
Chin up, there's worse things in life.
Grant