20 Most Recent LG 42PC3D 42 in. Plasma Television - Page 5 Questions & Answers

Either your Y sustain board went out or your upper and lower Y buffer boards went out. Worst case scenario is your panel went out. But you won't know without replacing the other boards first.

This sounds like a very common issue.If set is hard to turn on (takes several tries)but will eventually turn on hereis what my guess would be.Every set has a standby power supplythat is running 7/24 if the set is plugged in and it supplies voltage to theremote circuit that turn on the main power supply for the tv and hence turn theset on.This is an area where companies cut corners by using lower rated voltage caps.By this I mean Standby usually provides under 10 volts to trigger the seton----what they do is use filter caps rated at say 10 volts max in a circuitwith 9 volts (example)=with the standby on all the time the filter caps(electrolytic caps) dry out and fail.The problem usually begins where you have to turn set on or or two times andgradually gets worse--takes longer and more tries to get it to come up.Once on it will stay on until turned off for a period of time.The caps will begin to work better (regain some of thecapacitance) as they get hot--hence one it is on it will seem ok.The beauty of this problem is most of themhappen when set is a year or two old (no warranty) and all you have to do islook at the top to locate bad ones.They are generally black or blue and round and vary in --they have twoconnections each--a + for positive and a - for negative--not unlike a batterywhich in a way they are. The + and - are marked on top and bottom of most boards.They are easy to replace and not expensive parts.The tops are silverand metal looking with creases on top and if bad they will be puffed up ontop---tops must be perfectly flat with no brown material leaking top or bottom.If this is your problem once you id them (make a drawing) you can begin.Here is the critical part---on each cap is also marked the value like 220uf 10vdc---220 micro farad at 10 volts maximum.If you find for example 6 puffed up and all are 10 vdc replace them with thesame value capacitance (like the 220 uf) but go up to at least in this case(from 10 volts) to a 16 or higher rated voltage cap.The only issue is when you go up in voltage rated value the cap is larger sosometimes there is an issue of physical space for the replacement on the boardto fit them in.The reason they cheapen these sets in this way is if 10 caps and you make25,000 sets there is a considerable savings in parts cost. They do not care as long as it lasts past the usual one year parts warranty.I have taken the time to be long winded because this really sounds like it maybe the problem you have.See attached photo of a typical cap and if you have questions or need advicelet me know.

Look to see what inverter board/s this model uses---likely if two--one is bad or if one it drives the left/right sides of the Panel--should not be too hard to locate by Google the model number "boards"

Google the model number for "sustain" board/s

Almost anything can be fixed, can you describe "bad picture quality" a little more?

sounds like some buttons on your remote have failed

The provided description is typical for failure of a YSUS board, which is in turn quite typical for LG 42PC1DA and a bunch of other makes and models which all share the same internals.To find out whether it's the YSUS or the ZSUS board that has gone bad look at the following article:http://blog.coppelltvrepair.com/2011/02/hp-pl4260n-suddenly-lost-picture-how-to.htmlThis is for a different make and model, but has the same core modules that 42PC1DA has.This article also addresses the case when the TV refuses to come on, which is usually caused by a shorted IPM module on a YSUS board which, however, did not lead to burning the fuse as it normally does.The failure is actually the same, only the symptom is different.If the failed board is the YSUS (which is the case most of the times, but not always) then you may want to checkhttp://blog.coppelltvrepair.com/2011/03/how-to-uninstall-6871qyh053b-and.htmlFinally, you may consider the following:http://blog.coppelltvrepair.com/2011/05/should-i-replace-repair-one-or-both.htmlShould you need to have one or both boards serviced you can use the following:http://www.ebay.com/itm/Sustain-6871QYH053B-LG-42PC1DA-REPAIR-EXCHANGE-/110535815308Good luck!

I had same problem - no picture, but sound worked - LG 42PC3d - was two months past warranty, but LG agreed to fix it as a warranty call. Service guy was out within a week to replace the Z SUS(?) board. Works fine now. This must be a typical problem, as LG did fix it, even though the warranty had expired. Good luck.

If you are not getting any power at all I would check the power supply.You can get get parts for this tv at www.interliquidparts.com

for this symptom (over diffusion) the voltage for Vsetup has to be decreased, or for opposite (under diffusion) has to be increased. These would be on your sustain board Y. Make very SMALL adjustment, as this can be very touchy potentiometer. There is a sticker on back of panel that will have all the voltages for Vs, Va, Ve, Vscan; these are very important, have to be spot on.

Hi,

First, connect the TV to a DVD player and observe if problem will still be there. If problem persists, then it mean the fault is from your TV's LCD inverter. Sometimes, a defective video cord can cause this type of problem, this is why I asked you to connect the TV to a DVD player.....

Your TV has a long board that is called LCD inverter board. This board is defective or dying.

This long LCD inverter board's only job is to provide the TV LCD screen panel to have a back-light to the LCD screen panel to produced a picture.

Try websites like shopjimmy.com, ebay.com to buy a refurbish long LCD inverter board for the replacement.

If you are not a TV expert, please take the TV to a repairman for the LCD inverter replacement. This is not expensive to fix...

Note that TV store current, so wait for some minutes before attempting to open the TV's back cover.

Regards.

first try the address board or buffer board.if this
does not repair it,the panel is defective.

HelloPlease see the pic to turn on the tv from power button or you can get the manual from HERE

check and replace the switching relay that could be defective

Hi
A common problem for these is bad capacitors in the power supply, Remove the back from your Tv and look at the power supply on the left hand side.

You will see roughly around 9 x capacitors that are bulged / domed shaped on top usually these are valued at 3300uf 10V any that have bulged or leaked a brown like substance should be changed.
This will cure the problem as they overheat being sat next to a heatsink that gets very hot!
Try and change them for the same 3300uf but a higher voltage.
Hope this helps

Sounds like the main power board is overheating.

Try blowing out the back of the TV with a couple of cans of compressed air to remove built up dust and debris.

Hope this helps!