Page 25 of the manual.
Initializing the Scanner
If the scanner’s display locks up or does not work properly after you connect a power source, you might need to initialize the scanner.
n Important: This procedure clears all information you stored in the scanner’s memory. Only initialize the scanner when you are sure the scanner is not working properly.
1. Turn off the scanner, then turn it on again. WELCOME SCAnnInG rECEIVEr appears.
2. Press 0, then press 1 while the welcome message is on the screen. InItIAL appears for about two seconds, then YES — Ent and No — CLEAr appear alternately.
3
. Press ENT. WAIt appears for about two seconds.
n Note: Do not turn off the scanner until the initialization is complete. When the initialization is complete, 1CH 000.0000 appears on the display.