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How can I fix my Sharp ER - 3110 ?

After our daily X1/Z1 total our sharp went into a LK mode and will not accept any key press.
Tried the problem solving in the manual to no avail!
It will allow us to do a P2 - 261.x function for the time, but nothing else, not even the P2 - 260.x date function.
There is no access to any switches on the front of the register, just a blank.
Any help would be appreciated
Thank you
Andrew

Andrew
June 2012
I'm pretty sure that is lock mode isn't it? That means you haven't signed on. If you use clerk keys, slide a key into the clerk slot at the front to sign on. Otherwise try signing on with a PIN number and your clerk button.
If you need a manual, C-tech collective have all of the Sharp ER-3110 manuals here:

http://the-checkout-tech.com/manuals/cashregisters/Sharp4.php

Registerman
June 2012

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Find out how to mend Sharp cash registers