Last week following the release of the Oreo update, I downloaded the firmware and updated the TV via USB.

All seemed to be working fine until yesterday evening when the TV got into a bootloop.

It turns on, I can see the Sony logo, then the Anroid animation, followed by the Andriod logo, and then it boots into the main menu. Roughly 10/15 seconds later (during wihch the TV is fine and operating), the screen goes blank and the TV reboots.

At one point, I reinstered the USB key and it stopped the bootloop. I got a message saying "Firmware already updated, you can remove the USB key" and this seemed to resolve the issue. I also had the ethernet cable unplugged during this. However, a few hours later it went back into the bootloop.

Can anyone shed any light on how I might be able to resolve this? Should I do a factory reset? Or is there something executing in the background (like an automated update check)  that may be kicking the TV into the bootloop? The fact that the USB key briefly stopped the loop is interesting. Thanks in advance for any help!