Battery is dead - no green light.

it need new battery or you need to open it with your back up key and reset your combnon to the safe if that don't work the safe is broke

Some safes come with a key to open it with when this happens.key hole is cancelled under or near the keypad...not sure if yours is one of them.or there maybe a slot to plug in a battery pack .good luck..hope I have helped.

Could be the battery holder is bad. A1 Locksmith Burlingame CA 94010 have Sentry safe locks, keys, battery holders, battery door covers, and door handles. But only a small supply in stock.

Battery does not have enough current to actuate the mechanism. I have 2 Sentry 1610's with the same problem. I solved it by removing the battery & using a variable DC Power Supply set to 9 volts, and adjusting the current up until I got a response to my combination on the keypad. This is the only way I can get into or close my safes now.

Sounds like the batteries are dead.
How to install sentry safe batteries
slide open the battery cover located just below the keypad.
Insert a paper clip or pen point into the small hole in the cover. Push in while sliding cover to the right. Disconnect and remove the battery holder. Insert the 4-batteries as indicated.
reconnect the connector and put back the battery holder. Slide the cover back in place.
How do I insert the batteries on my advanced electronic lock safe? On the newer model Fireproof Sentry Safes my locksmith recommended me To install batteries,
turn the electronic lock case to the right and remove. Insert four new batteries as indicated, replace the electronic lock case and turn to the left to reassemble.

Locksmiths say this is how to install sentry safe batteries
slide open the battery cover located just below the keypad.
Insert a paper clip or pen point into the small hole in the cover. Push in while sliding cover to the right. Disconnect and remove the battery holder. Insert the 4-batteries as indicated.
reconnect the connector and put back the battery holder. Slide the cover back in place.
How do I insert the batteries on my advanced electronic lock safe? On the newer model Fireproof Sentry Safes my locksmith recommended me To install batteries,
turn the electronic lock case to the right and remove. Insert four new batteries as indicated, replace the electronic lock case and turn to the left to reassemble.

To install sentry fireproof safe battery
slide open the battery cover located just below the keypad.
Insert a paper clip or pen point into the small hole in the cover. Push in while sliding cover to the right. Disconnect and remove the battery holder. Insert the 4-batteries as indicated.
reconnect the connector and put back the sentry safe battery holder. Slide the cover back in place.
How do I insert the batteries on my advanced electronic lock safe? On the newer model Fireproof Sentry Safes my locksmith recommended me To install batteries,
turn the electronic lock case to the right and remove. Insert four new batteries as indicated, replace the electronic lock case and turn to the left to reassemble.

Locksmiths install sentry safe batteries this way
slide open the battery cover located just below the keypad.
Insert a paper clip or pen point into the small hole in the cover. Push in while sliding cover to the right. Disconnect and remove the sentry safe battery holder Insert the 4-batteries as indicated.
reconnect the connector and put back the battery holder. Slide the cover back in place.
How do I insert the batteries on my advanced electronic lock safe? On the newer model Fireproof Sentry Safes my locksmith recommended me To install batteries,
turn the electronic lock case to the right and remove. Insert four new batteries as indicated, replace the electronic lock case and turn to the left to reassemble.

Use paperclip to push in pin size hole below keyboard and then slide panel to right. Battery box is right there. Replace batteries and then was already to accept code.

How to open electronic sentry safes.

Locksmith opening instructions manual for sentry fireproof electronic security safes. Insert the tubular sentry key into the lock to the left of the key pad. Turn the key all the way to the right until the plunger pops out. Press the five-digit factory code. The green Proceed light will come on. Pull the handle down; to crack the sentry door open.