1. Set the LCD contrast to a higher level.
2. Replace the batteries

1. Remove all batteries, reinsert into the remote temperature sensor first, then into the indoor weather station.
2. Place remote temperature sensor closer to the indoor weather station.
3. Be sure all batteries are fresh.
4. No other interfering sources are being used (such as computer monitors, TV sets, headphone, or speakers) in the vicinity. The signal travels in a straight line, and electrical source near that "line" may cause interference.

if there is a consistent problem, please contact us via email at support@lacrossetechnology.com or by phone at 1-888-211-1923