This 50.00g digital scale stopped working for an unknown reason, and could not be calibrated to fix it. After further inspection I realized the scale still accurately measured negative values. I opened the scale and flipped the resistive sensor and now the scale works (albeit in negative values).

The kicker is, now when I lift the weighing platform, it shows me a proper positive number - reversing the fix brings the problems back.

STEP BY STEP
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1. Pry the weighing surface off
2. Ensure screws below are tight, if not tighten and test scale
3. Remove screws
4. Flip the scale and open the battery compartment
5. Remove the next two screws attaching the sensor
6. Flip the sensor and re-assemble
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