It is most likely a derivation path issue. You can connect your ledger with either Metamask (Connect to hardware wallet) or try f.e. [https://www.myetherwallet.com/wallet/access](https://www.myetherwallet.com/wallet/access).
Maybe at first install you did not select the most obvious address, but maybe a few pages further on the address tree to hide it a little and maybe you forgot about this…