Why does my Baumatic induction stove turns off automatically?

I have a Baumatic 30 cm 2 induction stove. There are several problems with the stove.
1. The stove turns off by itself after I have used it for a few minutes.
2. There are times it just doesn't turn on. After I turn it on, the indicator shows "H' and just blinks. This is a hit and miss situation.
3. Sometimes after I turn off the stove and turn it on again, the stove won't turn on, the light just blinks.

Begonia
September 2010