Vetta V100A Manual page 54

• Screen reading is weak or fading.
Symptom of interference or a weak battery.
Replace the battery.
• Screen readings are erratic and read too high or too low.
Symptom of a weak battery.
Replace the battery.
• Screen "frozen", no response to buttons.
Symptom of a weak battery.
Replace the battery.
• No display whatsoever.
Battery is completely dead, or not installed.
Replace or install the battery.