If it fails to power on, first check if the battery is installed correctly and has sufficient power—replace the battery with a new one if necessary. If random numbers are displayed, the issue may be electromagnetic interference (keep it away from motors, magnets, or other electronic devices) or dirty/loose electrical contacts. Clean the battery contacts with a dry cotton swab; if the problem remains, the internal electronic components may be faulty, and the caliper should be repaired or replaced by a professional.
