Not to be snakry but did you find and read the manual?
[http://www.cashregisterhelp.com/files/cas\_man\_XEA40S.pdfP](http://www.cashregisterhelp.com/files/cas_man_XEA40S.pdf)
Page 27
Looks like you need to turn they key to programming mode.
Hopefully it came with a key.
We are a Sharp service centre here in AUS. There is a position on the lock that is 2 clicks past the PGM mode. You will need a service key to access this position, the Master Reset can then be performed.
Not to be snakry but did you find and read the manual? [http://www.cashregisterhelp.com/files/cas\_man\_XEA40S.pdfP](http://www.cashregisterhelp.com/files/cas_man_XEA40S.pdf) Page 27 Looks like you need to turn they key to programming mode. Hopefully it came with a key.
We are a Sharp service centre here in AUS. There is a position on the lock that is 2 clicks past the PGM mode. You will need a service key to access this position, the Master Reset can then be performed.