Error code E009 on Cassio cash register PCR-T500

Reactivating Deleted button functions. Not having a No Sale button is a useful feature to against theft.

https://www.google.com/search?q=PCR-T500+program+no+sale+button

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Question edited for clarity.

https://www.manualslib.com/manual/719074/Casio-Pcr-T500.html?page=98

videos as well

https://www.google.com/search?q=Casio+PCR-T500.+I+have+a+error+code+004

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I believe it is password required.

If the error stops when in program mode, press subtotal. If it stops in Reg mode, press cash

http://www.casio4business.com/sa/products/downloads/manuals/PCRT500_INC-e.pdf

It is in the user manual, around page E-65:

http://www.manualslib.com/download/719074/Casio-Pcr-T500.html

Do as much of a manual wipe of information stored then do a restore to factory default

Go to Casio Support webpage to Download Manual for your device:
http://www.casio4business.com/sa/support/downloads/downloads_manuals.html

You have a digit limit set on the cash button. It has been programmed to allow only a small amount to be paid via cash. You need to look up the codes for digit limit (HALO) in your manual and it will guide you through the processes for setting a digit limit on the cash button. If you have lost the manual, one of the users has one listed here:
Casio PCR T500 PCR T520 Operation and programming manual PDF

Remove the digit limit. Theres a code in the manual somewhere to remove limit on cash key