1. Are you directly connected to the sign with a single cable?  If so, check the connection on the back of your computer to ensure they are all secure.


2. The RF Modem or wireless antennae labeled “Computer End” must be plugged in and powered up in order to communicate with your sign. 
   • Check all of these connections.  The “red” power light on the black box should be on.  Ensure the serial cable connection to the black box and the serial connection to your computer are all connected securely.
   • If you are using a USB to Serial converter [ usually required if your computer is a laptop model], confirm that the device is installed correctly in the “Device Manager” of your computer. 
   • If you are unfamiliar with this tool, you can use the “Help & Support” feature of your computer's operating system to locate and start the on-line tool. 


3. Make certain that the converter device is inserted into one of the USB ports on the computer.  In the “Device Manager” window, locate the “Ports (COM & LPT)” category and expand the list.  Look for a specific device labeled “…USB to Serial Comm. Port” and note the Comm. port to which it is assigned.  If you do not see this device listed, you may have a bad USB to Serial converter device or it is not installed correctly.  This will not allow the communication from your computer to send data to your sign.

Check the power breaker to your sign to confirm that a breaker has not been tripped.  Flip each breaker to the off position individually for the sign, waite 30 seconds, turn back each breaker individually to the on position.  Watch the sign for any flashing or changes.

Monochrome signs should always play the last message programmed.  Check to ensure there is not a schedule or expiration for message on a monochrome sign.

"Access Code Violation"

If you receive a Windows error message like the one above when sending messaged to the LED sign through the WinEDT software, please download the fix linked below:

WinEDT Windows Error

1. Check the power breaker to your sign to confirm that a breaker has not been tripped.  Flip each breaker to the off position individually for the sign, waite 30 seconds, turn back each breaker individually to the on position.  Watch the sign for any flashing or changes.



2. Check the connections from the 'Master' side to the 'slave' side and confirm that they are connected and secure.  On the rear of the sign, there are clear labels which indicate 'Master' or 'Slave' unit.  Disconnect, then reconnect this cable to ensure it has a secure connection. 

1. Check the power breaker to your sign to confirm that a breaker has not been tripped.  Flip each breaker to the off position individually for the sign, wait 30 seconds, turn back each breaker individually to the on position.  Watch the sign for any flashing or changes.



2. Take a picture of the problem area of the sign and email it to support@theLEDsigncompany.net.  This will help us in diagnosing which internal part of your sign is failing. 

1. If the sign's temperature reads 266 degrees, then your sign has a defective temperature probe which requires replacement.  Notify our Technical Support team with the information concerning this repair.



2. If your sign does not display a temperature on the sign, the temperature probe may not be connected or there may be a bad connection to the sign.  The temperature probe is a white honeycomb-looking device on or near your LED sign.  Follow the cable from the temperature probe to the rear of the sign to ensure the probe is connected correctly.  Notify our Technical Support team if repair is required.

The sign receives the time information from your computer.  Check that your computer time is set to the correct time and time region for your area.  Resend the time to your sign.