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The Tv was switched on after about 4 days being disconnected from the mains, basically after the android Logo it staid on a blank screen. Unable to use the TV after several power cycles. Decided to carry out a factory reset, after about 5 attempts I managed to get the TV back on again, but had to carry out the setup at least twice. During the 1st setup, managed to get to the digital tune menu, as soon as I clicked on the menu, the screen went totally blank, I then re-started the set up sequence but this time I skipped the digital setup. The TV is on the internet, I can get You Tube, Netflix, Amazon etc, but as soon as I go into settings and try to do a digital tune from there, I get the same blank screen when choosing the menu option. After a couple of failed attempts, I tried the analogue tune, managed to get to the second level menu, but again blank screen, It seems that there might be a software problem, has any one experienced anything similar or could point me in the right direction?
I'd try going through the settings and performing another factory settings from there (Storage and reset - Factory settings).
Also, update the software: https://www.sony.co.uk/electronics/support/lcd-tvs-android-xd85xx_x85xxd-series/kd-55xd8599/download...
Win_88
This could be a power glitch in the tuner itself, have you tried disconnecting the aerial/satellite cable then tune the TV without it to "flush" or "reset" the tuner, then try tuning normally afterwards?