After numerous phone calls and email exchanges I've come to the conclusion that the S&G electronic lock on my safe is kaput. Local lock and safe guys have quoted around $500 to crack the safe and replace the lock, does this sound like a reasonable price? I'm seriously considering having it converted to a dial type combination lock so I don't have to worry about this again...
Did you put a new battery in? Must use Duracell or Energizer.
If so, can you hear the solenoid click? If so wiggle the handle back and forth a bit. If not use a block of wood and a mallet and TAP on the front of the safe just above or below the lock to try and help the solenoid.
And as suggested, check the wires. There is a telephone wire type connector that may have come loose.
If you get the safe open, leave it open. It will save you the cost of having it drilled open.
Is it under warranty? If so the manufacturer may cover the cost of opening, repairing, and replacing the lock.
If these methods fail, then yes, time to call a locksmith or safe tech. Check their reputation first.
$500 isn't a bad price. I would go with a mechanical lock. I like the convenience of a digital lock but for this very reason, I will not own one.
If you need help finding a reputable locksmith/safe tech go hear.
Associated Locksmiths of America. Click on "Find a locksmith". Associated Locksmiths of America (ALOA) is an international organization of professional locksmiths. With emphasis on "professional".
Just so you know, they will have to drill a hole through the door into the safe lock. Don't freak out. If they start drilling multiple holes, then freak out. One or two holes should do it to gain access to the solenoid. The hole is usually repaired by driving a tapered carbide pin in the hole and breaking it off. Then grind flush.
Good luck.