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You didnt provide the type of safe but on mine the bottom of the keypad lock mechanism has a compartment for the battery. Mine doesnt need to be opened to change the battery. If your has a compartment if you push on it it will pop open then you just change the battery.
All you need to do is slide the battery cover to the Open position, then open the battery cover to access the batteries. If it doesn't open easily you may have some corrosion on the batteries holding the cover closed.
Put both thumbs in the center of the flat side (the bottom). Apply downward pressure and move your thumbs toward the "tail" of the can opener to slide the bottom off and reveal the battery compartment.
I assume you mean that the entry keypad works when the door is open but not when the door is closed. This usually indicates that the signal strength on the entry pad is low. Try changing the battery.
Insert a small Philips screwdriver in the opening on the bottom of the battery compartment cover. Pull the cover slightly outwards then pull the cover down. The battery in the compartment is a 9V battery. Then replace the cover by inserting the lip in the top of the battery compartment and then snap it into place.
If you change the battery quickly, you shouldn't need to reprogram the opener. If a new battery doesn't solve the problem, check what may be causing signal interference when the door is down. (Consider moving the keypad to a spot closer to the door opening. I know that we have the keypads placed on the side of the door jamb on our garage doors. When the small handheld remote units start to loose their batteries, bringing the remotes to that area that often works.)
@ Frans Bedford-Visser On the right side of the battery compartment you can see some vertical plastic lines. Pull those towards the compartment. Simultaneously open the compartment as indicated by the arrow. It will open. Took me a while to figure it out but it works.
Good morning, afternoon, evening or night; whatever time of day you are viewing this solution post. Thank you for choosing FixYa to assist you. You are having problems because you calculator won't turn on. I think you should try changing the batteries. Did you know that your calculator has two batteries powering it? Not only are the 4 AAA batteries powering it, but there is also a CR 3V Lithium Back Up battery powering it as well. First, try changing the 4 AAA batteries. If that still does not power your calculator properly, you will need to replace the lithium back up battery. You can find this at a department store or store that carries electronics. To do this, open your regular battery compartment. Above the AAA batteries is a compartment that says "BACK UP BATTERY CR1616 OR CR1620" with a picture of it. Use a small crosshead screwdriver to open the compartment. Take the old battery out and replace it with the new one. Rescrew the lithium battery compartment back on and close the AAA battery compartment. Turn on your calculator and see if that works. I hope this solution solves this.
I just changed the batteries yesterday. It was hard to open the battery compartment with bare hands/finders. I used flat screw driver to poke into the notch in the center of the transmitter. Or you can try poke into any **** around the compartment. It works!