Lens on E850 Refuses to retract when camera is shut off

Lens on E850 Refuses to retract when camera is shut off

My E850 8 Megapixel camera when last time used attempted to shut off when power button was depressed. However, Lens structure will not retract and lens cover close over lens. Have taken battery out and put it back into unit. Unit attempts to power up and audible "buzzing" not unlike "Grrrrrrrrrrrrr... Grrrrrrrrrr...". is then heard and will not stop until I remove battery again. What is the issue and is it repairable by myself. Thank You