Hello

I bought a Sony AG9 55" in October and it has worked beautifully until recently. Now, however, when the TV has sat for some time (at least 4-5 hours) and I turn it on, I have sound but just a black screen. After 2-3 mins the screen comes to life.  The white LED is lit on the bottom of the TV.

I have factory reset twice, unplugged cord from the wall overnight, not installed 'suggested apps' after factory reset and disabled WiFi to see if that is the issue but to no avail. I have also cleared caches and data on numerous apps and disabled some but also no luck. 

Any ideas?

Thanks

Jeff