i have a validation error on tec cash machine. i have heard i can use the s key to clear this without losing all sales in the memory. how to i do this

trish, December 2009

The following procedure should work on TEC registers of recent vintage:
1) Unplug the register from power.
2) Insert the S key and turn to the unlabelled position one click clockwise past the Z position (referred to as the 'BLIND' position in the manual).
3) Plug in the register.

If this doesn't work, post again with the model number of your register and I'll see if I can help.

Steve, December 2009