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what is serivce mode?

what is serives mode. samsung cash register er4915
needs to reset after not beinr used for a long time
stacey, April 2009
Hi.
If you have left it off for a long time and lost all of the programming, then you probably have ruined the battery by holding it flat for so long. It would be best to take it to a dealer to get a new battery soldered in to it and they can re-program it too.

Mark, April 2009
link Click here to see other fixes for Samsung ER4915.