Question about LG 60PC1D 60 in. Plasma Television

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I have a lg 42inch plasma tv we heared what sounded like a crack and the screen want blank but we still have sound

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This is caused by the main IC overheating on the Y SUSTAIN BOARD
This board when the back is of your tv is on the left hand side, You can confirm this as the board has 2 x white fuses on it. The fuse marked f2 will be blown, Replacing this DOES NOT correct the fault.
You need to order a new board as you can not buy the IC needed anywhere!! Beleive me iv tried!!!!!!!
Hope this helps to all theat have this model, This is also the same for the 42" & 50"

Posted on Mar 05, 2010

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Y-sus and possibly buffer boards

Posted on Feb 04, 2010

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1 Answer

No picture, no sound


Diagnose the Problem

The first step in diagnosis is to check the display for any cracks on the screen. If the screen appears cracked, then the repairs may require plasma screen replacement. A cracked screen means that the gases inside have probably escaped. There is no way to refill the gases and the whole display will have to be changed. In this case, an authorized service may be able to provide more details. If the problem persists, then a gas leak is perhaps not the cause of a loss in display. Lamp burnout could be one reason behind a blank screen.

Check the Fuse

Most of the time, the plasma TV fuse is at fault for no picture on an LG Plasma screen. In such a case, changing the fuse should make an LG Plasma TV functional.
  1. Unplug the TV and wait for 10 minutes for the capacitors to discharge.
  2. Take a Digital Multimeter and set it to the 0-200 ohm range.
  3. Touch the red and black probes to each other and check the readings. The multimeter reading should be in the range of 0-2 ohms.
  4. Now touch the red and black probes to each end of the fuse. If the multi-meter reads '1' or 'OL', then the fuse has blown and needs replacement. If the multi-meter shows the same reading as before, the problem lies elsewhere. Some cases may require the motherboard to be completely replaced.

Fix the Problem

If an LG plasma TV has no picture and no sound, then either the Y-sustain or the Z-sustain are at fault. Follow these steps to determine and fix the problem.
  1. Unplug the TV and wait for 10 minutes for all the capacitors to discharge. Then open the back panel of the TV.
  2. Unplug the Z-sustain from the TV and plug the TV into the power supply. If there is sound, then the Z-sustain is faulty and will need changing.
  3. If there is no sound, follow the same procedure and unplug the Y-sustain. Check for sound. If there is a sound, then the Y-sustain is faulty.
  4. If the Y-sustain is faulty, a user may have to check the Y-buffer. He will have to follow the same procedure and unplug the Y-buffer this time. If there is some picture with sound, it means that the Y-buffer is faulty.
Keep in mind that a plasma TV runs on very high voltage. The voltage on some connectors exceeds 400V (in excess of 200 joules of energy). This high voltage can be very dangerous. That why it's important for users to always make sure the capacitors have discharged before performing any type of diagnosis or fixes on an LG Plasma or any other television set.

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I have a 42" LG LCD TV and just experienced this today. Watching cable, then the screen went to black, but audio continued. I pressed the guide button on my remote and pic came on with my guide menu. But then went to black again 10sec later and has remained that way for nearly an hour. Tried switching off both cable box and TV, disconnecting and reconnecting cables, but no luck. Finally unplugged mains, waited a minute, then turned back on. Everything seems normal now after the reboot. Phew.

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