Scanner sensor locked whats wrong lock switch

The scanner lock button on the Kyocera TASKalfa 4012i is located on the left-hand side of the machine, towards the back of the scanner unit. It is a small lever that can be turned to lock or unlock the scanner unit.
To solve the C3100 error on the Kyocera TASKalfa 4012i, you should first check to make sure that the scanner lock is in the unlocked position. If the scanner lock is already unlocked, the issue may be related to the scanner motor or the scanner home position sensor.
In this case, it is recommended that you contact Kyocera technical support or a certified Kyocera service technician for assistance in resolving the issue.

All you need to do is unlock the scanner. Just open the flatbed cover and on the left edge is the slider for the lock. Slide it towards you and that's it unlocked.

Dear
The scanner locked means the scanner jammed(it may loosen reassembling the scanner platen cover),very rare the scanner motor gets defect. Check home position sensor.
Thanks.

All scanners come with the scanning head locked to prevent damage to it during shipping. On the back of the scanner, where the power cord and wires connect, there will be a sliding switch, sometimes a turning type lock, with two positions, one with the icon of a closed [so locked] padlock and the other with the icon of a open [so unlocked] padlock. Every scanner I have bought describes this lock in the setup manual.

The scanner lock is situated at the left side of the flat bed scanner. switch it to UNLOCK.

Issue: ERROR LCD: Release the scanner lock switch and turn the power off and back on.
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Solution: Unlock the scanner lock switch

The scanner must be unlocked before turning the unit on.

Turn off the power.

Lift the document cover.

The scanner lock switch is on the left hand side of the underside of the document cover.

Slide the scanner lock switch to the release mark (an open padlock icon).

Lock the switch before transporting.

Close the document cover.

Turn the machine on.

If machine still is not working repeat the power off / on cycle waiting 5 seconds in between.

what model is your printer? if your printer is those AIO printer, which means it comes with a scanner.. you will be able to find the scanner lock at behind or side of the scanner...

When you open the top (like putting a document in for scanning) there is a slider (button) on the left hand side of the glass. Just slide it from the "locked" symbol to the "unlocked" symbol.
It took me 2 hours to fix this problem, after the house cleaner turned my MFP to locked without me knowing.
;-)
Cheers,
Stefan

It can also be the ribbon cable connecting the scanner to the formatter board. Check that it is connected properly.

Error: Scanner Locked Cause: The scanner glass’s sensor does not move to the home position. Action: 1. turn off, and then on 2. if (1) doesn't work, chek sensor