Been there - done that. Reloaded firmware from scratch, all to no avail.
Yesdo the replacement tuners have the same part numbers?
The only way I can conceive this being a firmware issue is if there is a failed bit or bits in the flash in the relevant section of code, which "fortunately" does not cause a firmware crash. I have no idea whether Humax have included any built-in test, but when I was doing that sort of thing it was standard to checksum the EPROM (in my day) at boot.I don't know if it's software, firmware or hardware issue.
I think there is something about that here..
If the flash is corrupt or failed, I doubt a reflash would succeeed (the write process should be followed by a veriify scan). For my money it is a vanishingly small chance this is a firmware issue (and I have no idea what you mean by "software").
Maybe academic so far as you are concerned, but a useful data point for the community to cogitate on. Thanks for going to the trouble.As you may have gathered, this has become a purely academic exercise
Great price!I have picked up an immaculate replacement T2 for twenty quid.