163 is able to sit flush against the base unit referring to fig5 an led display 171 is shown comprising two seven segment displays 172 174 in an alternate embodiment the led display 171 is installed in place of the message panels 162 164 166 fig4 as such when an led signal 126 from the microcontroller 84 fig3 is generated the led display 171 will output a alphanumeric code representative of the maintenance required by the garage door operator 10 the user is then able to cross reference the code to a user manual or a chart that maybe located near the display unit 160 referring to fig6 an lcd display 176 is shown wherein in an alternate embodiment the lcd display 176 is installed into the display unit instead of either the led display 171 or the message panels 162 164 166 a particular advantage of the lcd display 176 is its ability to display text based messages in particular the microcontroller 84 fig3 produces an lcd signal that enables a variety of specific messages to be displayed on the lcd display 176 to explicitly indicate to the user the service that needs to be performed on the garage door operator in another aspect the microcontroller 84 is programmed to generate an lcd display signal that scrolls across the face of the display thereby enabling short messages to appear such messages may include specific operating parameter information or the name and number of a preferred service provider referring to fig4 6 in the foregoing discussion it was shown that the.