If it is not fixed to the wall , drop it on a bed holding the opening dial and as it bounces open it . It took me a couple of goes to get it right but it works
A friend had a similar issue with his lock. After taking the back plate off I found that silver arm that locks into the door handle cam had lost a tiny c clip and come apart. One I reassembled both parts of the arm on the retaining peg using the c clip and put the white spacer ring on top everything looked right. Reassembling the gear section while keeping the round handle return spring from popping off was challenging.
You can open them faster with a rare earth puck magnet that you can putting the combination digits in.
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There are also this type of attack but the Lock Picking Lawyer shows the workings. The magnet pulls the solenoid in the same way. It is a low skill attack.
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Classic mistake keeping the emergency key inside the safe!
It can be opened very easily in 10 seconds with a large rare earth puck magnet in a sock. They all work the same way using an electronic magnetic solenoid operated by the internal battery. The puck magnet does it externally.
https://www.google.com/search?q=open+safe+with+puck+magnet.
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Look at the YouTube channel 'The Lock Picking Lawyer'. All his videos are short and sweet. All combination locks can be decoded with a feeler gauge or a thin piece of plastic. He will have opened this lock.
Well you put the code in and it opens.
I guess you missed of the part where you ignored the 'Change Battery' notifications and the incessant beeping :>D Or has it just failed, found it in a skip, found it in a house, code written on the back?
You can open it faster with a rare earth puck magnet than you can inputting the code. The word ;Safe; is a misnomer.