Error message "LOCK" in my Sony UP-897MD. What's the solution?

Question edited for a lot more clarity.

You just take it to your local Sony Service Centre. This is a highly specialized printer and very expensive. There is help in this link

https://www.google.com/search?q=sony+up-897md+doesn%27t+print

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Per SONY; To service the C:31 code, Sony recommends you do the following: Turn off the camcorder. Remove the battery or disconnect the AC power adapter for 60 seconds. Insert the battery or reconnect the AC adapter. Turn on the camcorder. If the error message appears, service may be required.

i hv a micromax a40but i forgate the pattern lock

Could also be the cable that runs to the head from the main board. One controls the signal and one the power to the elements. If either is disconnected the printer will still think its printing ok. Also there are some components on the print head if they fail you will need to repalce the head.

look up driver downloads there are a few that may help

Common problem cheaper to replace the printer. UP-897MD

Repair Parts : Customer Service: ordering, order tracking, returns Email: [email protected] Email: [email protected] Phone: 800-538-7550, 9:00 a.m. - 7:00 p.m. ET, Monday - Friday.

Install the correct drivers for your handset then connect the phone and make sure you have the correct port set in XS++

Default code is usually 00000, I think...

Error 20 is "Cassette compartment motor lock" this is meaning the cassette loading mech is not accepting the tape It could be miss-aligned in it's position or one of the sensors is defective or the motor is bad

reel sensor is the problem of your camera it is a common problem to that model,maybe the pinch roller is loosen to the post cause of the lock of that is been broke..that roller is that one that pulling the tape...only a technician can put it back to the mechanism and replace that lock...in sony service they replace the whole assembly and cost a lots...i suggest find other service center for fixing it...hope that roller is not lost in your camera...