Quote: Originally Posted by fletcher5555
I will check that mate. I have bought a audio surpressor which what DJ's use appently which is supposed to filter out every noise apart from that of music which I should recive by today so Im gunna give that a try also. I was doin so well till this problem! All I need to do is get rid of this noise properly mount the Graphic and the install is complete!
Try a ground loop isolator. The suppressors commonly go on the power connections, and most will not support a big load.
As some of the others say, have you looked at a DC-DC PSU that's actually built for in car use? It's a lot more efficient than using an invertor and if your hardware is suitable for it will make your life a lot easier. I remember when I used an invertor a few years ago and it was a PITA (this was before you could buy shutdown control for them) and I would NEVER go back to using an invertor even if you paid me.
Edit: this is probably my last post in this thread, as we seems to be all telling you the same answer to your SIMPLE problem again and again.