Troobleshootings: TV no memorize channels after APS (automatic programm search). Fixed by copying bootimg.prg file and flashimg.lst at the root of drive pen drive FAT-formatted. 1_unplug tv and insert pen drive 2_while holding input button on tv set then plug tv and wait until the led starts flashing and do not interrupt. 3_when update done the tv itself restart and all is OK
Tested on bricked tv with blue screen only. Just put usb drive formatted at fat16 in usb plug and plug AC cord. This is orig firmware tested by me on 40L7335d and 50L7355D. Do not write 25Q16 and 24c256 - it's pointless.