The older Win7 computer that I used for Litecoin crashed. I have backups of the wallet.dat file from it.
My new computer had no Litecoin stuff on it so I downloaded the newest Litecoin Core and let it sync, and the balances showed Zero, then I exited and found the folder with wallet.dat in it and renamed it zerowallet.dat, then I copied my old backup wallet file into it and restarted Litecoin Core. It still showed zero balance and no transactions, of which there used to be many.
What can I do to recover my litecoins?