Model Number: GBD277PDB09

The other day, I noticed that the display on the oven is blank. I tried pushing the Upper Off, then the Lower Off, then the Clock, followed by all other buttons and nothing would show on the display. The light button does work.
When I push the Start button, (after the button beep) I get a beeping sequence (dit-dah-dit-dit-dit).
I also tried going through the sequence to start the oven (Upper Oven - Start)(thinking the display may be dead) and it didn't work.
Fortunately (or unfortunately), we don't use the oven too often, so I am willing to troubleshoot and hopefully repair this myself.
Any ideas about the problem and solution? (Oven is about 4.5 years old.)
Thanks,
Tim