I made the tv a long time ago and i never used it because i hat no idea how to design the background. Finally it's finished.
I traced the tv with the pen tool and added colors i got from the original image with the Eyedropper.
To repeat the retro circles at the wall behind i made a path to fill it with the pattern.
The rest i worked with the pen tool and square tool. I made two squares with rounded corners and used "Difference" in the "Path Menu" to create these black and brown squares at the bottom.