Thank you for the file.
I tried the file, but didn't get the install to start. I uploaded the .pkg file to root of MBR FAT32 formatted 4gb usb2.0 stick. I tried both usb ports and also tried the ok button on the remote and also tried the button on the tv while reconnecting power. I also tried to rename the file to upgrade_loader.pkg. The red light under the tv just keeps blinking slow about 1/sec, tv is completely dark and nothing happens. I think the remote is bluetooth, so I don't know can the "OK" button even work at this point on startup.
Is there something I could still try to do? Should it start the install or is there possibly something broken?
Thank you for your help!