Press and on the TV (not the remote). While holding the button, plug the power cord back in .
The TV will scan the USB, verify the version, and prompt you to install. Select . Method B: Force Flash (If TV is Stuck/Boot-Looping) Download T658T01 LF1V551 Update part1 rar
Locate the extracted file. If it is a .zip file, unless instructed otherwise by specific local update guides. Press and on the TV (not the remote)