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how to fix frozen screen on uniwell dx 915?

how to fix frozen screen on uniwell dx 915?
sandy, December 2015
There is a programming manual that might help too:

https://the-checkout-tech.com/manuals/cashregisters/Uniwell_DX-890_DX-895_DX-915_TX-870_TX-875_SX-700_SX-705_SX-800_SX-805_SX-7000_SX-7505_SX-8500_SX-8505_programming_manual.html

Registerman, December 2015
I guess you just do a Google search for - say - "uniwell dx 915 frozen"

If you do that you find things like this: http://uniwellsupport.blogspot.co.uk/2012/10/how-to-reset-uniwell-register.html

XXX, December 2015
link Click here to see other fixes for Uniwell.