Got 2x of these boxes, and they both have an annoying problem, sometimes the channels give the message, Channel Scrambled, or Not Available, even though when the signals checked, the Strength and Quality are fine, if switched off by the remote, and straight back on again, the channels will appear as normal.

Anyone got any ideas ?

Could be a problem with the aerial, as its being powered by an old Sky box upstairs which is buggered now, it doesn't come on, just stuck on standby, so may have something to do with that, as the aerial is connected to the RF2 output which i had to switch the power on for, by going into the engineer menu, as put the box in the sitting room (originally in the kitchen) on Friday to try (connected to a different aerial), and its been fine.

EDIT: Tried the other box ive got in the kitchen at first, and it had the same problem in there.

Are you aware that the Humax can provide power for an aerial amplifier? Take the Sky box out of the aerial cabling then on the Humax remote Menu>Installation (default PIN is 0000) and then select Antenna Power.

Wasn't aware of that, ill give it a try, thanks

There is no "engineer menu". (There's an "Installer Setup menu".)

Aerials don't need power, unless they incorporate an amplifier.

How would connecting a TV aerial to an RF OUTput help? The aerial signal can't go anywhere.

It would also be advisable to turn the "antenna power" setting in the menu to the off position.

This appears to be some sort of antenna amplifier built into the box, but I've noticed since DSO and the increase in power from my local transmitter (Divis) it really knocks the signal off when switched on. Signal overload is as bad as too little signal as far as Freeview is concerned.

Try this and see what happens.

See the OP's post #2 for an explanation of Martin Liddle's post.

Antenna power has nothing to do with an extra amplifier built into the box. Antenna power, when switched ON, simply puts a 5 volt supply onto the aerial lead to power an active (amplified) set top aerial.