Originally posted by zoomlens I have a K50 that now will not put enough light on the image to make it clearly visible. Even over exposing mostly leaves a real dark image with just the very light portions showing. Is it worth trying to get repaired?
That's an interesting description of the problem...
and with 99,9% certainty it is the solenoid which is stuck.
It is easy to repair, you already got the instructions.
Just make sure you find the Japan-Solenoid, everthing about the solenoid is described here:
A LITTLE BIT OF HISTORY: Development of the solenoid in Pentax cameras - PentaxForums.com
Just a few days I added supplementary information.