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beeping sound and all lights are blinking?

my cash register is giving beeping sound and all lights are blinking
J-2500S
Ravneet Chand, June 2015
Usually means the battery is faulty and all programming is lost. The model sounds like a JCM so you are probably out of luck unless you can find a dealer who still fixes and programs them.

Registerman, July 2015
link Click here to see other fixes for Sharp J-2500S.