Black Hole
May contain traces of nut
Plug the aerial lead that currently runs to the Humax into a TV and check it has signal (alternatively, if a TV daisy-chained to the Humax has signal I think we can take it as read that there is signal at the Humax input).
If signal at the aerial lead is positively verified, give the Humax a cold boot (go to standby, wait for everything to shut down - ie the disk clicks off and the Ethernet socket stops flashing, power off at the mains, wait a bit, power on again).
If still no good, download and install the standard (non-custom) firmware version 1.02.32 (ie the latest available) and re-flash it.
If still no good, is it in warranty?
If signal at the aerial lead is positively verified, give the Humax a cold boot (go to standby, wait for everything to shut down - ie the disk clicks off and the Ethernet socket stops flashing, power off at the mains, wait a bit, power on again).
If still no good, download and install the standard (non-custom) firmware version 1.02.32 (ie the latest available) and re-flash it.
If still no good, is it in warranty?