The HD TV’s should also have scart sockets so your existing humax should still work using that (assuming you meant 9200t). 😉
Should you wish to retrieve your programmes there are a few different ways dependent on how comfortable you are with disassembling your humax. See the blog pages here (link) for some of the programs.
HumaxMediaController and Elinker do not require any disassembly/ modification whereas the rest rely on a direct connection to the drive (or USB-IDE) {applies to 9200t only}