20 Most Recent LG RU-42PX10 42 in. HD-Ready Plasma Television - Page 3 Questions & Answers

Hello Jay,
The pop sound you herd was a blown capacitor, Open the back cover and check the main capacitor in power supply, It need replacement. But first check if the oil of the capacitor drop on the circuit then it must first cleaned then dry the area where the oil of capacitor spread.
Thanks.

y-sustain

You can either use test equipment etc or start guessing----most likely board would be main board that controls screen and all information viewed there.Want to see what boards it may have: shopjimmy.com

If issue is different after replacing a board--suspect new board is bad or not the correct one. I see a lot of people here guessing and buying and replacing boards and having little or no success.While a guess may get lucky these sets are not really "repaired" in this fashion--tests are made with scope, signal generator, etc and a specific board is then tried.

The color wheel is messed up, cant be fixed, try calling the help number

Hi that wold indicate a problem with one of your sustain boards. Most likelly the y-sus but it could be either one. You can find parts for this TV at www.interliquidparts.com remember when ordering parts you have to go by part number of the part.

if board is damaged, have it replaced. Go to www.shopjimmy.com for parts.

Open the back cover and check the fuses on Y Sus Board and X Sus Board. If you can find a blown fuse, just replace that board and your problem will be fixed.

Hi:
The best possible solution to your problem is to replace both sustain boards at the same time, The X and Y sustain boards. LG tech support recommends replacing the digital board as well when replacing their boards, even during LG's tech training seminars they suggest you replace all major boards for continued viewing enjoyment. But in my experience you should replace the X systain also, but make sure the Y you replaced is still good.

This is a common fault solution which can be checked and corrected by you assuming that there is no component failure.This can be due to faulty capacitors that have gone weak and resumes the value after some time when the cotlage builds up. Also there is a high possibility that the components over a period of heating and cooling, tend to bring on a problem of dry soldering. So my advice is to check the set for some loose joints that have played on to give you these erratic shut downs or poor performance.

The best way to check for loose connections is to tap lightly when the set is powered on , If there is change while tapping then it seems that there are DRY solder joints. Remove main plug, the covers - with caution of high voltage, check for dry joints, use a good soldering iron to solder all suspected points.

Sometimes the fault occurs when the set warms up, if so you can simulate the heat using a hair dryer on the suspected areas, try with the power supply, distribution, Processor controller, driver controllers on the A/V related sections. Also the use a FREEZE-IT spray can simulate the components to cool and show up the fault.

Based on the above method you must be able to locate the area of fault and solder the sections. Sometimes large IC's- ones with more pins- tend to have drying in some pins and so cause faults related to the IC's protocol. Have a rough idea of looking into the areas to reduce the time of probing.

Check for tips to look into the SMPS unit with some of my tips:

http://www.fixya.com/support/r5826301-working_switch_mode_power_supplies

Thank you for using Fixya.

Be patience. The SUB Borads in this tv has went out. Try Shop Jimmy.Com they are $68.00 to $110.00 each....... I hope this helps you

You most likely have a problem with the voltage protection circuitry, the screen starts up, the crowbar is somehow activated, and it shuts it down, You need a service manual. Below, below that is a user manual, they have invaluable information, The service manual has troubleshooting and repair info found nowhere else.
http://74.125.155.132/search?q=cache:DmdPzTp_CKIJ:www.shema.ru/0_s/tv_1/goldstar_lg/RT_42PX20_Chassis_RF_043B_Service_manual.pdf+LG+RU-42PX10+service+manual&cd=37&hl=en&ct=clnk&gl=nz



http://www.retrevo.com/support/LG-RU-42PX10-TVs-manual/id/14714ci361/t/2/

Tries tv unplug,replug it back like about an hour later for the tv to a resetting itself.Tv now,might and will work again sometimes.Not.Tries the power switch on the tv remote pushes off/on a few times,for the power supply board trying to kick start the tv Tuner signal board again.Still tv not have lit up the screen panel and work than it could be anythings in it boards are shorted or loses,if tv have a/c power to it.Take it to the tv shops for prices and quotes.Shops,must have trouble shoot and repair are ur best options.Replacement of refurbishes PCB boards,any replacements are a gest at best,if tv is a Plasma and still have power to the tv.

Yes . All plasma TVs are HD. It will accept HD signal inputs.

maybe z board bad need replaced