Blaupunkt Radio starts by itself

Hello together! Some time ago I built into my Golf IV a blue point Acapulco MP 52. Actually from the beginning the radio has turned off on average 1 times/hour and in most cases went on again. (The running song is then restarted) At some point I discovered the problem here with the antenna amplifier. And I also built such a thing into it. Then the radio went off when the key was pulled off too, before that was probably e in some cables wrong. However, the problem is still there now! Has something broken on the radio now, since I drove for a while without antenna amplifier, or is there still something wrong with the stupid plugs/cables??? Greetings SLR