x9606 Every couple of hours TV switches off and on?

Hi,

TV: 40PFL9606
FW: 0.14.97.0

Every couple of hours (sometimes 1 hour, sometimes 2 hours) the:
TV screen: black
+4 seconds: Ambilight: black
+4 seconds: Ambilight comes back
+3 seconds: TV screen comes back
(timings are indications)

This happens regardless of the source (Humax 5200 on HDMI2, Mac Mini on HDMI1)
I have exchanged HDMI cables without luck.

Any ideas? Known issue?

Anyone?

Anyone? It looks like the TV's computer 'crashes' or reboots. I'll probably call customer service again and hope they can fix it.