In the event that your validator hardware is no longer accessible, you can fully re-create your validator from the backup seed/keywords.
Simply proceed to install your replacement validator using the Installation Guide but at the point where you create the new keypairs, simply regenerate the keypairs so that the new validator assumes your original identity
# - disaster recovery
# recover validator identity
~/Safecoin/target/release/safecoin-keygen recover -o ~/ledger/validator-identity.json
# recover vote-account
~/Safecoin/target/release/safecoin-keygen recover -o ~/ledger/validator-vote-account.json
# recover stake-account
~/Safecoin/target/release/safecoin-keygen recover -o ~/ledger/validator-stake-account.json
Once the keys are generated, you can continue the installation.