Lens will not retract on Sanyo VPC-T850, 8.1 megapixel, digital

that's happen due to physical damage like dropping etc.
try to open inside and align well the lens mechanism

Try these procedures.

Common faults for this:

The lens motor is defective, lens gears jammed. Fix is lens unit replacement.

The lens servo drive circuit is not functioning. Fix is to replace the circuit board that contains the lens servo control circuits.

The connector assembly between the lens is not making proper contact, or the lens wire assembly is defective. Fix is replacement of the cable and connectors if applicable in the particular model. If the connectors on the circuit board or lens are defective, then the appropriate unit must be replaced.

No power is going to the lens unit, and or the lens servo circuit. Fix is replacement of the drive circuit board, or the power inverter if it uses a separate feed for the lens only.

Generally, with these low cost cameras they generally do not pay to service out of warranty. The service cost can approach the cost of replacing the camera.

Common causes of failures in these cameras is from water (getting wet), or dropping, or rough usage.

Jerry G.

The systems control board has detected a problem with the camera lens and shut it down. The lens is run by a tiny motor that extends and retracts for focusing, the motor has seized or the gears have jammed preventing operation. The only option is to take it to a camera technician to see if he can salvage the lens, or replace it.

You should try to seek service from a Sanyo Authorized Service Center:

http://us.sanyo.com/Customer-Support-Service-Center-Locator

You need New batteries or you SD card is not the right card your camera recommends see manufacturers recommendations.

This is probably THE most common failure among digital cameras. There's a halfway chance of fixing it yourself, described here: http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

This is probably THE single most common failure among digital cameras. There's a halfway chance of fixing it yourself, described here: http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

Your lens may need adjusting. This info may help . Other People solved problem. Lots of Info on this link.

http://www.fixya.com/support/t102982-e_18_problem

Well maybe I can solve this..... My lens would not retract and showed two error messages. Tried a number of tricks that have been recommended on this site to no avail. Ultimately what worked for me was pushing quite hard on the barrel of the lens trying to force it back in ( yeah i know, sounds extreme but did'n't think it could make the situation any worse ). The lens remained in the locked out position not moving in spite of the fact that I pushed it fairly hard. When I turned it on the lens retracted and it appears to be fully recovered from whatever was ailing it. Hope this works for you.