Question about Samsung TXR3079 TV
Samsung txr3079 wont power up. Gets power as indicated by red light but will not turn on.
Thanks in advance.
I had the same problem with my Samsung TV Model: TXR3079WHX. However, I was able to repair my set while it was still intermittant (would turn off by itself after 30 minutes of operating, would have to wait 5 minutes before it would turn on again).
I troubleshot my problem with a can of component cooler from Radio Shack and found my problem to be a defective voltage regulator, identified as "QR015" on the main circuit board (the same board that contains the high voltage section).
Before I proceed any further I need to strongly warn you. Do not attempt to remove the back cover, troubleshoot, repair or perform the actions that I have done, if you are not a "qualified service technician". Removing the back cover exposes you (and anyone else) to harmful and deadly electric shock, even though the TV may be unplugged from the wall outlet and turned off. You (or anyone else) can be seriously injured or even killed. If you are not qualified, play it safe by allowing others who are qualified repair this for you.
The defective part (overheats and shuts your TV off) is voltage regulator manufactured by Fairchild. The part number is KA75450ZTA. This part is available from Mouser Electronics for less than 20 cents plus shipping. In order to replace this part a qualified technician will need to remove certain cables and unscrew the main board to allow access to desolder and solder the new component.
Hope this helps.
Posted on Jun 06, 2009
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Posted on Jan 02, 2017
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