Model: Personal Series LCD Clock
The clock display show dashes; time is not displayed.
Is this a Transmitter with an External Antenna? If yes, was the clock installed between the 7th and 38th minute of the hour? It should set at the 39th minute of the hour. You can power down the Transmitter, wait 30 seconds, and power it back on. A power cycle set the Transmitter with an External Antenna to broadcast for eight consecutive hours.
A Transmitter with an Internal Antenna continuously broadcasts its signal continuously.
Identify scope of clocks experiencing issue - single clock or all clocks/clocks in specific area.
Single clock: verify if the issue is due to its power supply, a signal issue at its install location, or a defective clock.
All clocks/clocks in specific area: verify the Transmitter(s) state to identify if the cause of the issue is due to Transmitter broadcasting to the installation area is in an error state.
If the clocks do not set their time, it may be due to an interference at the installation area that is preventing a clock(s) from receiving a broadcasting signal.
When certain types of electronic light ballasts become defective they may radiate broadband noise, which can interfere with wireless devices. While interference issues are unlikely with the Primex system, high levels of noise present in the 72-76MHz range could potentially cause clocks which are located far from the Transmitter and also within the close proximity of these ballasts to not receive a signal. Very limited instances have occurred in the past, which has only been found to happen when ballasts become defective.