Help, the coins disappeared after the blockchain update in 2018, the wallet indicated 0 instead of 7 coins, new coins are displayed. The backup made a new updated wallet, the valid date is also new. Perhaps at the wallet address it will be possible to trace the history and coins. Thank.
You will need to explain a bit more about what software you are using for us to help. What wallet/version?
If it’s a full node you will need to be sure it’s updated and fully synced for your balance to show.