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Ln52a860 has sound, but only black screen, no fuzz, no anything, like it is off.

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Have you checked your brightness controls

Posted on Oct 13, 2010

  • twila-d-r Aug 14, 2011

    That was the first thing we checked when ours had this issue. Had a tech come check it out. He said that it's the power inverters that supply power to the CFL tubes for the backlight. He can replace them for about $500 but there's no guarantee that it will be a permanent fix because the actual malfunction could be being caused by the panel itself . There are no replacement panels currently being manufactured for this model since it's so "old" (a little over 2 years!). I think we need to complain to Samsung! a $3500 tv when new should not be failing after only 2.5 years!

    If you get a quick input blurb in the upper left corner when you first turn the tv on and maybe a portion of the screen gets backlight bleed light then quickly goes black (check this with the room really dark to be able to see it), it's more than likely the inverters. The unit has a failsafe that cuts all power to the inverters when it detects a malfunction and keeps them from powering the backlights.


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I am having the same problem and actually happened to be there when it first occurred. The screen just goes dark. In our case, you turn it off then back on and you get a very brief flash showing the source name and then it goes dark again. In a very dark room, it looks like the backlight doesn't illuminate the lower left corner of the screen. Will be calling Samsung today.

Read the troubleshooting part of the manual and it said to unplug the tv for 30 seconds. That didn't work, so we left it unplugged overnight. Still no image.

Posted on Jul 26, 2011


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