I have a Samsung PN43E440A2F 43” plasma that operates normally, with the exception of the display randomly shutting off after several minutes of running (approximately 5 minutes). When the display turns off, I continue to receive audio through the optical output to an external speaker, but there is no backlight and there appears to be no image either (using the flashlight test). The audio function doesn't seem to fail regardless of how long I leave the TV on. I'm using an external speaker because I don't currently have access to the TV's internal speakers (I left the speakers at the owner's house by mistake when picking up the TV).
In this state (display off, audio still playing), the “function”/power button on the display doesn't seem to do anything, and I don't currently have access to the remote either, as I left that with the speakers mistakenly as well. The TV must be unplugged and plugged back in at this point to get the image to return on the display, and then the above cycle repeats, where the image will just go blank after approximately 5 minutes with the audio still playing.
There is no visible damage to any of the components on the top of the boards (X-Buffer, Y-Buffer, X/Y-Main, SMPS, Mainboard, T-Con) and I don't smell anything funky, so I wasn't really sure where to even start with this. I also attached the “Fast Track” troubleshooting guide that I found for this (or a very similar) model, which helps identify each of the boards in my photos.
In this state (display off, audio still playing), the “function”/power button on the display doesn't seem to do anything, and I don't currently have access to the remote either, as I left that with the speakers mistakenly as well. The TV must be unplugged and plugged back in at this point to get the image to return on the display, and then the above cycle repeats, where the image will just go blank after approximately 5 minutes with the audio still playing.
There is no visible damage to any of the components on the top of the boards (X-Buffer, Y-Buffer, X/Y-Main, SMPS, Mainboard, T-Con) and I don't smell anything funky, so I wasn't really sure where to even start with this. I also attached the “Fast Track” troubleshooting guide that I found for this (or a very similar) model, which helps identify each of the boards in my photos.
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