While you wait for answers, we may have found some information which could help you.
Click here for Digital Camera Pentax OptioProblem with Pentax Optio M20 Camara?
pentax optio m20 wont turn on?
lens error 0x0311 pentax optio E70L ?
Replace screen?
my pentax optio m20 keeps showing batteries depleted even with new ones ?
Pentax optio M20?