Hi,

I just bought a second hand SAM 4s ER-420M cash till. Turned it on a presssed a few key, and a "Sequence Error" came up ". Days latter I'm in dispair - nothing helpful in the mannual or on-line. I can't do anything with the till now. How can a reset the till or get rid of the fault. HELP!!!

Simon, March 2012

The manual should be helpful. Maybe you have the wrong one. You should have this manual:

http://the-checkout-tech.com/manuals/cashregisters/Samsung_ER-420M_operating_programming_manual.html

Look at the section called "initial clear" first. if that doesn't work, you may have to RAM clear it (all clear)

Registerman, March 2012