NO channels now, we had some before!!!!!

Here is how you should have it connected.
1- Antenna (rabbit ears or whatever)
2- Converter box
3- Television

When you turn on the TV and the converter box, go to channel 3 on the TV. You should see the converter box signal there. If you do not see it try channel 4. Bring up the convert box menu and go through the AUTO SEARCH, not manual search. Now your box will search all the frequencies and add any stations that are in your area. Make sure you change channels with the converter box, not the tv. An antenna on the roof will still provide somewhat better range, but even rabbit ears will likely pick up something. If you still get no channels you could be too far away, digital signals have a shorter range than analog signals. You can check your local TV stations website or call to see if they are broadcasting digital yet.

Bought a vga to rca adapter,it works perfect
Amazon com MALLCROWN VGA to RCA Converter PC VGA TO TV Convert VGA to AV...

I have the same problem. My Magnavox is shutting off every few minutes so I went out to buy RCA model today and sure enough no signals on RCA, after many scans and rechecking connects. So I put the Magnavox back and even though it shuts off every few minutes at least I have channels back. I guess I need cable or something before I crack up with a nervous brake down!

Also, you can cross reference your house on www.antennaweb.org to see how strong of an antenna you need. This site will also show you specific angles to point your antenna at for best reception. If you're less than 15 - 20 miles away from the stations you want, an amplified set of rabbit ears will do, any longer, and you will need a rooftop or something outdoors. The oldschool arial we've found has worked best.