Casio TE-2400 - Credit and Check Payments

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[ 17 ] Display test (repeat)
[Function]
LCD, Pop-up display and transaction display tests are performed as follows.
[Pop-up display] [Main display]
Input command

Pattern 1

Pattern 2

End
[Operation]
Operation : 5 2 1 SUBTOTAL
* Press “C” key or turn off the power to stop the test.
[PRINT]
Press any key
Press any key
8.8.8.8.8.8.8.8.
3 4 5 6 7 8 9 0
DIAG 1
8888888888
,,,,,,,,,,
ABCDEFGH I JKLMNOP
QRSTUVWXYZabcde f
1234567890
DISP 521
DISP OK
END 52 1