Why would HD Access DTA 1030D stop working after a few hours?

1)First it said the signal is too weak so get another antenna, but then a second later pressing one of the buttons the menu, or one the arrows contradicted that, it came on.

2)The auto scanning only found 3 channels instead the of 5 or 6 the without the converter.

3)It worked for a few hours. It may be coincidence but when the VCR started a program recording the converter stopped working. Snow on the screen.

Do you have any knowledge about this product?
There are search results out there for reviews, but they are waiting for reviews.
The customer service number is out of service?