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


A plasma screen uses thousands of tiny fluorescent bulbs in different colours (red blue and green) to produce a picture. Just like standard house hold fluro lamps, these tiny bulbs use starters to turn them on and off. As there are so many bulbs in the panel and therefore starters, the panel has a number of "starter controllers". These controllers can control anywhere from a quarter up to half of the screen. If a controller dies, it takes out it's segment of the screen. Unfortunately, it sounds as if this is what has happened in the case of your LG - this is also common in NEC and Fujitsu panels. Althought these controllers can be fixed, it usually takes more time and money than it's worth- unless you have it under warranty in which case the manufacturer will just replace it. Sorry top be the bearer of bad news. hope it helps

LG 42PC3D 42 in.... | Answered on Jun 13, 2019


Use a jumper wire with alligator clips on both ends. This may be dangerous if the voltage is very high and the capacitance is large say 1Mfd and a large spark is anticipated. If a circuit board I anticipate voltages less than 12 volts and you can hook one end of the alligator clip one side of the capacitor and the second alligator clip to the remaining terminal of the capacitor. Expect a spark to discharge when you short the capacitor.

LG 42PC3D 42 in.... | Answered on Jul 18, 2018


Unfortunately it is NOT a "Scratch"... actually it is one of the "Row Driving IC's" that is failed/failing, this will only get worse and eventually it will get more & more. Worst of all there isn't anything that can be done, sorry.

LG 42PC3D 42 in.... | Answered on Mar 02, 2018


Never had that model but had other similar models do that when dust shorted out the High Voltage section.
I suggest clean it out with a gentle vacuum and an upholstery attachment. First check to see if set is under warranty.
Unless you are checked-out with high voltages suggest have a qualified tech test and do this for you.

LG 42PC3D 42 in.... | Answered on Jan 02, 2018


Hello Jacques,
This type of failure on this plasma is due to a defective IC that is mounted underneath the black heatsink located on the Ysustainer board. In order to isolate this failure to the Ysustainer board, I would suggest to check the fuses at location FS2 and FS3.
Here is more info for in regards to the Ysustainer board: REPAIR SERVICE FOR EBR31872801 YSUS BOARD FOR FLASHING DISPLAY TV NOT...

LG 42PC3D 42 in.... | Answered on Dec 30, 2017


google software upgrades and try. if not look at Z-Sustain or maybe Y-Sus

LG 42PC3D 42 in.... | Answered on Dec 03, 2017


It could be any of 4 boards, either take it in for service or get a new set.

LG 42PC3D 42 in.... | Answered on Nov 16, 2017


Try to replace T-Con Assy.
Download Service Manual from attached link: LG 42PC1RR CHASSIS MF056L SM Service Manual free download schematics...

LG 42PC3D 42 in.... | Answered on Apr 20, 2017


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

LG 42PC3D 42 in.... | Answered on Mar 11, 2017


Hello Tiangston9.
These plasma TVs have a common failure with the Ysus boards, more specific an IC that is underneath the big heatsink. The capacitors in the power supply became defective as well.
Check the link to find parts to fix your TV.

LG 42PC3D 42 in.... | Answered on Mar 10, 2017


Tuner fault. Replace it. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

LG 42PC3D 42 in.... | Answered on Aug 19, 2015


Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
Some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

LG 42PC3D 42 in.... | Answered on Aug 10, 2015


It's a blank line used in the times of CRT televisions, and used for the transmission of ceefax data.

LG 42PC3D 42 in.... | Answered on Feb 12, 2015


Souunds like main power regulator board fault. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

LG 42PC3D 42 in.... | Answered on Nov 19, 2014


Looks like there are some board failures inside and might require attention by a qualified service technician.

LG 42PC3D 42 in.... | Answered on Jul 10, 2014

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