I had this tv set, stuck at the 'SMARTTV' screen with coloured logo. Impossible to find the original Smart Tech firmware, so i searched in kazmielec.tech some firmware compatible with the tv-set hardware (CV338H-T42 card and Y400HJ6.PE1 screen). The firmware i tried was wrong and it bricked the TV, just showing a black screen and not entering stand by anymore. I supposed it needed special hardware to reflash the NAND, but i was wrong, it just needed a working compatible firmware. Still in the kazmielek page i tried ' CV338H-T42_1920x1080_Telefunken TF-LED43S81T2' and it finally worked. I wrote it on a usb stick, i pressed the power button on tv and i inserted the plug in power outlet, and the standby led started to flash red and green. After some time the procedure stopped, and the TV finally started to show images again, reversed but finally working. I fixed the image issues in service menu (entering tv menu and 1147 with remote). The TV remote is completely compatible with the Telefunken firmware, only difference is the HOME and ASPECT key reversed.
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https://mega.nz/file/5FBz2TzQ#VMEFOm...O9ElyQOV68GZBY
here is the firmware, of course it must be unzipped, in a FAT32 formatted usb stick.
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