Question about LG 42PC3DV 42 in. Plasma EDTV

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I have a 42pc3dv and my YSUS is bad. The part number on my YSUS reads 6871QYH048B. However, if i look up the compatible parts for my tv i get 6871QYH053B. These two boards look totally identical, and I just wonder if they're interchangeable, since the 53b is available for as little as $80 while the 48b costs 250. Please email me back at benmms@comcast.net thanks!

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DRACO A5OG
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SOURCE: Lines in screen

6781QCH038C is the correct replacement.

There is another replacement part for LG's ending with 060Q. Electronia-USA.com stated it may not work with LG's but does work for Vizio's

Yes, a non pro can do this repair.

Posted on Dec 25, 2008

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  • 85 Answers

SOURCE: LG 50PX1D, YSUS and ZSUS board replacement

first thing that you can do is use the Google serch by just typing in lg 50px1d and see if you get any thing close to what you need.

Posted on Jan 06, 2009

micromaster
  • 3614 Answers

SOURCE: could you tell me the

moz-screenshot.jpg MAKE: LG MODEL: 42PC3DV-UD
P/N: 6870QYH005B
4954e83.jpg

Posted on Jan 15, 2009

  • 140 Answers

SOURCE: sound but no pic

The Lg you have actually has three boards that can cause the problem you are talking about. The control board, the y-board or the z-board. Usually most technicians will change the y-board and z board together since it is usually a combination of both that cause the problem. The control board by itself can cause the problem. The part #'s are as follows and these are straight from the LG plasma tv training manuals. 1- Control board 6871QCH053G, 2- Y board 6871QYH036D, and the Z-board is
6871QZH041B. The boards can be checked by looking at the voltages and signals but as I said some of those problems for no picture interrelate between boards. Hope this helped. Also with the back cover off those boards are clearly marked. The y board is a small board on the left and the Z board is on the right. The control board is of course in between them. They have tiny white stickers with the part # and assy# on them an also directly on the board itself. Always disconnect the power cord when looking at the inside by taking the back cover off.

Posted on Jan 15, 2009

  • 3 Answers

SOURCE: LG 42pc3dv-ud

Yes you need to replace the board LG 6871QYH048B. The board has a short. Check the fuses and one of them should have no continuity
because it is open.

Replace that board and problem solved

Posted on Aug 03, 2009

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Insignia NS-PDP50 Plasma tv HDMI inputs are inoperative


First of all, make sure that the hdmi BLOCK setting is correct. This prohibits both hdmi inputs and the DVI from working. I didn't even know they existed so I replaced the YSUS board and then I found the settings were my issue all along. If the settings are correct then the most likely culprit is the YSUS board part number: BR36223601. It is a compatible card for your TV. There are several suitable subs for this board and it is a snap to replace. I found a like new board that works better than my original board for only $25.00. The heck with those rip offs for prices up to nearly $300... Good Luck.

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This issue here with the powerboard and the resisters on the Ysus is related to purchasing the WROUNG power supply unit. What I recommend you do is take the old supply out andmatch up the serial number and part number to get the EXACT unit.

You simply just cannot purchase a part on ebay and expect results. Many times people sale things and not know what type of output voltage the TV is supposed to take, Resulting in further damage to the unit.

Partstore.com would have this part for you. I recommend using the part number of the chasis. You will now have to replace the power board and the Ysus.


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I have a LG 42pc3dv with no picture just sound. I have this tv over 3 years, other people experienced the same problem, some of them mentioned the Y sustain board. Is this an easy fix.


Check the fuse on the Z-sustain module. The module all the way to the right (looking from the back) If blown (and before the set went out there was a loud pop) you need to change the IC on the Z-sustain part number STK 795-820 or 821 and the fuse. If you don't want to bother unsoldering and soldering back this part and you know the fuse is blown then replace the Z-sustain module. Do a google, ebay, or shopjimmy.com search with the model number for price and availibility.

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I have a lg 42pc3dv plasma tv. it made a loud pop


Looking at it from the back, the board on the left is the ysus. You should see a big red cable coming from the power supply board in the middle of the set going to the ysus. Near the red cable plug on the ysus should be a fuse. Most likely the fuse has blown. If it is you need a ysus PCB. Check out encompassparts.com. If you get a new board be sure to set all the controls on the new board to match the old board. If you don't you will have little sparkles all over the screen when it comes back on. I hope this helps. You may want to check all fuses on the power supply and the zsus which is on the right side of the set. I have seen both the ysus and zsus be bad together. Good luck and thanks.

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LG 50PX1D, YSUS and ZSUS board replacement


first thing that you can do is use the Google serch by just typing in lg 50px1d and see if you get any thing close to what you need.

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I have a 42hp25bat haier plasma tv black screen also, I saw someone state they replaced a hybrid on the ysus board what part is this?


If you have audio, but no video for any inputs it is likely it is the Y SUS board.

You should still open the unit and verify that its either the YSUS, ZSUS, or control board. Check the fuses to see if any are blown. If so, it is likely that board is bad. I don't know why they built the boards to blow before the fuse does.

For my issue, I had same problem but wasnt sure what to buy. I did open it and find 1 blown fuse. I replaced it and it still didn't work(hence a blown board).

While it was open, I noticed its all LG parts inside. So, write down the numbers of the unit and the part numbers off the YSUS, ZSUS, and main logic board.

Since its possible any of the costly parts could be bad, I ended up calling Haier and getting the local support shop to take a look at it. I paid $75 for them to tell me what I already knew. They wanted another 425 to fix the problem and extra $ if they needed to tune it further. They said the part was about 370.

Since there was no guarantee that I would be paying only 500, I figured I could check around to see if I could get a cheaper price. Also a new tv runs about 600-800 with a new warranty. In the end, I ordered the part from shopjimmy.com (one of the leading replacement parts places - they sell new and used parts) for about $175 with shipping. I paid a bit more for a new Y SUS board but it was worth it. It was still cheaper than the factory price of about 275-300. Luckily, I did not have to tune anything.

I'm not affiliated with shopjimmy, but they seem to be really nice(I called twice to ask for information) and have a good return policy. They are also cheaper than the other online parts places. SHOP JIMMY also lists on ebay, so you can find them there too. If you go to their website, you can find your brand and tv model and see what parts they have. They also give part numbers. They DO NOT have CROSS REFERENCE INFORMATION. However, the same part numbers are listed under other TVs and models. Remember LG is the manufacturer and the other companies buy from them. They only change the skin and the look of the tv for their own needs. I'm not sure what you mean by hybrid, but the parts that are interchangeable from model to model are really the same parts with different part numbers.

Another way, to search shopjimmy.com is to use the part numbers you pulled off your tv. This will identify all brands that use that exact part. Again, shopjimmy will not verify the parts will work in your tv. They only tell you to compare your part with the picture they show.

Once you get the part number off your TV, you can also google the part and see what comes back. I read alot about different issues. This is also how I found out that other parts from other brands will work in my tv....but the postings did not guarantee it. Try googling "Haier 42hp25bat parts" and "(the part number) LG parts".

The part I got was for a MAXENT. It was LG but for a MAXENT. I verified the part looked exactly like mine. Remember to look at circuits too. I noticed a few of the same boards had slightly different capacitors AND did not know if they would negatively affect my TV.

My Haier is now working fine. I snoozed on it for 8 months before fixing, but at least its up and running for superbowl weekend!

Bottomline, if you want to take a chance buy the Y SUS. As costly as the parts are, there is no guarantee that only one part is bad.

Also, the repair shop said to get warranty cause they see alot of issues with no name brands and the less expensive units. They said the brands they dont see many issues with are the old school brands, like Sony, Toshiba, etc. I have another TV that I just got a warranty for just before it expired....it was $300, but at least its covered for another 4 years.

GOOD LUCK.

P_In_dallas

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1 Answer

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Yes you need to replace the board LG 6871QYH048B. The board has a short. Check the fuses and one of them should have no continuity
because it is open.

Replace that board and problem solved

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