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Unplug your 487 ... time passes ... put your key in Prog mode - you need a manager key for this. press the C key - plug in the 487 ... lift your finger fron the C key. Move your manager key to off and A or B. Give it a try. If you get an error, press C key again. Try it again ... If that fails ... start over - press C and the key above it. The answer once was easily found at Royal ... but someone found out they could make $ by selling the owners manual literature - so that is gone. Good Luck

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15y ago
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11y ago

Unplug the register from the wall outlet, then turn the battery switch to the off position. Wait 10 seconds, then turn the battery switch back on and plug it in, and it will be completely reset.

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Q: How do you reset a royal ER 135 cash register?
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