Changing PIN on Key Pad

Here's a link for chamberlain garage door opener manuals.

http://homeappliance.manualsonline.com/manuals/mfg/chamberlain/chamberlain_garage_door_opener_product_list.html?s=gg314159

You need to reprogram the system please follow the instruction:

To re-set your code, please follow the steps outlined below:
1) Unplug your garage door opener from the electrical outlet.
2) Open the cover on your inside wall console. You should see a 9 Volt battery and an adjacent PROGRAM/OPERATEswitch. Slide the switch to PROGRAM.
3) Enter your new 4-digit code into the keypad outside.
4) Slide the switch back to OPERATE and replace the console cover.
5) Plug the garage door opener back in to the electrical outlet.
6) Test the new 4-digit code. (If the keypad does not illuminate, replace the 9 Volt battery)

IF you want more information you can click on this link:

http://www.chamberlain-diy.com/diy04/faq_view/0,1341,uid-f2l9cWRnbGtnaw==_942-id-9,00.html


Good luck....

Can you please provide the exact model number of your Security device...

Thanks