I have a fix for you guys which worked 100% for me on G85SB monitor. I was stuck in never ending "Preparing..." loop 1 - 99%.
You need to do "hard reset", then update should finish.
Step for "hard reset":
1) Turn on the monitor
2) Hold down POWER button on the monitor for 5 seconds. On this monitor, there is joystick on the back, you need to press it, menu is opened, move to Power Off option on the menu, then press the joystick and hold it down for 5 seconds
3) Release joystick (power button) on the monitor and immediately press POWER button on the remote and hold it down for 5 seconds
4) Release POWER button on the remote
5) Monitor should be powered off, wait more than 30 seconds
6) Turn on the monitor, you should see setup screen like after Factory Reset
7) Disconnect monitor from power outlet for more than 30 seconds
😎Connect monitor to power, turn it on (it turned on automatically in my case), finish setup but SKIP NETWORK SETUP for now and wait for upgrade to finish 100%. Then you can setup your network.
