I am looking for a new fix, I had BUZZS21010f_Plus_azan_07Feb2007 but it is no longer working since yesterday. please help I appreciate it. thanks

My Buzz Plus ( non Azan bin) is still working just fine. Perhaps you could describe the symptoms.

I just lost all channels, I have the usual message: no service or scrambled.

In fact, now I left my the remote on 1 channel for few minutes and it came back. I think it takes the receiver few minutes before scrambling the channel.

Sounds like a key roll. Sometimes, I've waited 10 minutes for keys to roll ( but not often). Sometimes they roll faster, if the box is turned off and on again at the back switch.
It's also possible there is a "switching" problem in your setup, but if it's working now, we'll just be happy.
:)