#NI
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Unknown brand name #298 calculator ribbon (black and red)
Part #BR80C
The manufacturer no longer makes this part, and there's no substitute part
Model # 81 Official Hewlett Packard calculator
Here are the diagrams and repair parts for Official Hewlett Packard 81 calculator, as well as links to manuals and error code tables, if available.
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Symptoms for gas cooktops
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Repair difficulty
Time required
45 minutes or less
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Repair difficulty
Time required
30 minutes or less
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