Press the PROG button again. The screen will show " 1 OFF ". Set First OFF Time:

If the LCD screen is blank, plug the timer into a live power outlet for at least 12–24 hours to charge the internal battery.

Insert the timer into a live wall outlet for at least 10 to 15 minutes to charge the internal rechargeable backup battery.

For further assistance, you can find the original digital manual hosted on the Panda BG resource archive . Instruction Manual