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Check to see if the power supply is functioning correctly, see if there is proper supply to the horiz output transistor. Check to see if there are drive pulses to the horiz output transistor. It is common that the horiz output transistor, power supply, and various support components can cause this type of fault. You will have to properly troubleshoot the set to service it. That's a potiential dog tv just hear me out with this tip: Check the service mode & the eeprom first! I have seen this happen (blank pix), replace eeprom or try to reset blindly with the service manual (are you samsung service authorized? Otherwise ask me by email for info on getting into it and model #), do the presses with samsung remote to get into service mode then press menu down key 3 times (this highlights the reset settings) then right button once instructs tv to reset stuff. The TV LED should go out. Press power again you should able to get pix back, Power down, do the service mode again and check your settings against service manual. I occasionally see this eeprom data go corrupt for any reason even volume problems. So far 4 done to these, one of them was bad eeprom right in the volume byte area! I fought this samsung tv blank pix for ages and gave up on that. While later, I got another sick samsung TV and pix does come up but something isn't right so jumped into service mode and looked at settings, one of them was wild. Cranked it down mid way down picture blanked out. Kept cranking that setting down, picture popped back on. BINGO now I know why. Sheesh. FYI: Eeprom in samsung sets isn't updated all the time, all the active settings that is changed is kept in memory on the zilog microcontroller IC till plug is pulled. The micro then will panic write those settings to eeprom. THAT was not DOCUMENTED in the service manual. The bad eeprom (was from volume corrupting) proved that. Resetting data fixed the soft memory where volume is located in microcontroller's and all is fine. Also can power cycled all you want. BUT TILL that plug is yanked, microcontroller writes good data to the bad eeprom, the byte where volume is stuck & corrupted. Plug this haunted set back in, volume control is now broken because tv read the bad eeprom in. Nearly all of the Samsung TV of this era using this common chassis uses AKB even on 19 sets. Make sure tube is also good and the eeprom. Hope this will save your time. Cheers, Wizard
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