Sharp register BUTTON NOT WORKING

Firstly, press subtotal (ST) button. If a price appears, you are in a sale and it is waiting for you to finish (try another method like credit). If it gives an error or beep when you press ST button and the drawer does not open when pressing CA/AT/NS, you probably haven't signed on. Try signing on using a PIN number (see clerk sign on in your manual)

Are you using a decimal point to enter prices? Enter it as 250001

to program an open misc key in the first 10 columns of the keyboard turn key to program and hit 100 subtotal, then press the key to be programmed. enter o and hit time , cash for a non taxable open key or press 400000000 time , cash for open taxable key
Phil

Depending on the flag setup maybe you might have to start with price then quantity..good luck
.

Each department in the register can be programed with a maximum price. Sharp calls it a HALO, for High Amount Lock-Out, and it prevents those silly mistakes like a cashier once made for me when my burger and shake came out to over $500.00.
If you're entering a reasonable price, but the register complains that it is OVER LIMIT, you need to program a higher HALO for that department. Look for the department programming in the manual.

INH. UNIT PR. means "Inhibit unit price". It means there is no price preprogramed for that department or PLU. Each department can be left open-priced, or preset. Open price is how you usually think of using a cash register: you enter a price, then touch the button. Preset price requires programing a price for a department in advance, but saves time in operation. You touch the Coffee button, for instance, and it automatically rings up the price you've set for a cup of coffee.
If you touch a normal, non-preset department without entering the price first, the register will error with the INH. UNIT PR message.
Touch the CLear key, enter the price, then touch the department.
Many of the Sharp registers, and I think the XE-A402 is one, allow a department to be both open and preset. It can also be programed to be inhibited completely.
The Owners Manual can be downloaded from Sharp here.

hi. E34 means the machine has had a limit programmed into it so that a maximum price can be entered. this stops staff accidentally charging say $1000 instead of $100. Try entering a lower price. The limit can be removed if desired. Mark

just search on google manual for sharp cash registers and go to webite of sharp besides when it says that just click cl and help 2 times and start over

What are you tax tables set up.  This version lets you set up multiple tax tables.  It may be calculating that.