Press and on the TV (not the remote) while plugging the power cord back in.
Release the button once the firmware update progress bar appears on the screen. Download S586T02 LF1V371 part01 rar
This specific split archive (part01.rar) is commonly found on technical support forums and firmware repositories like GPAK or 4PDA . Installation Overview Press and on the TV (not the remote)
Installing incorrect firmware can permanently damage ("brick") your TV. Verify that your TV’s current software version begins with V8-S586T02 in the Settings > About menu before proceeding. Download S586T02 LF1V371 part01 rar