Issue
D1255 Keypad alternately displays a screen of all zero’s and then a screen of all stars.
Solution
This is caused by dipswitch 6 on the keypad not being in the (On) position.
Part numbers D7212B, D9112B, D7212B1, D9112B1, D7212, D7412, D9112, D9124, D9412, D7412G, D9124G, D9412G, D7412GV2, D9124GV2, D9412GV2, D7412GV3, D9412GV3, D7412GV4, D9412GV4, B8512G, B9512G, D1255, D1255RB, D1255R, D1255W
