Blank screen but sound and ambilight are working

Hi,

I have a problem with my Philips 65PFS6659/12 TV. When I turn it on, there is often a blank screen. I noticed that when that happens, the Philips logo does not appear at startup. At the same time, Ambilight and sound are working. I have to turn the TV off and then turn it back on for the screen to start working. I tried changing the HDMI port to which my receiver is connected, but that didn't help. Does anyone know how to fix this problem? I would appreciate the help.

Thanks in advance!