regarding home safe?

replace the batteries this MAY give you a display, then try the 9,999 possible combination's or you could consider to go round the local fire station,they like a challenge the police would get involved you WOULD HAVE TO PROVE IT'S NOT BEEN STOLEN AND WHAT IT SHOULD CONTAIN they would then observe as it was cut open .(won't be any good as a SAFE anymore) but i bet you remember the next code number you use along with the spare key that you don't store in the SAFE )
(HINT)
save it as a phone number

wirecutterman
November 2009