Logik L22LDVB21 says No Signal, tried retuning but no joy. Please help

Poor signal strength is the bane of any receiver. See if you can improve matters by connecting your antenna to a good antenna amp and connect latter to your humax. Bet it works better. Also position as high as possible and direct it in the direction of most of the stations you want to receive.

make sure your tv aerial plugged in back of tv and your tv is on the dtv setting before trying to retune it. the sky box is usually on the scart or hdmi setting. hope this helps

Your TV is not receiving a strong enough signal to provide video.you may need to relocate your antenna if you have or get one if you do not have one.

Try the nearest country to yours Saeed. See what happens!

This could be too much signal thanks to the Freeview retunes going on. Your aerial is more sensitive at some frequencies, so there's more signal power higher up the frequency range.

A simple and inexpensive diagnosis tool is a variable attenuator. The MA1620 on this page is perfect for that job:
Splitters amplified splitters and attenuators

It will give you a way to reduce the signal level at one TV without affecting the other TVs in the house.

consult the owner manual or contact your signal provider (if not on antenna)

mine did that then wouldn't recognise the hard-drive

I found that 0399 worked

Loosing digital channels is equivlent to a snowy analog channel, check you cable connections, and splitters to the tv, since you have two of them out, it does not make sense that it is your tv. It is a conneciton in your cable line somewhere.