LG 50PG20 50 in. Plasma HDTV - Page 6 - Answered Questions & Fixed issues

there is a thin wire that controls the input output of the power button on the board, and you may have a problem with it, best suggestion to offer you is to have it serviced by LG technicians.

You can do this only with the factory remote by going into the menu and options menu.

what are the imput and output jacks on both units. I need to know which is which, and be specific. well get you going

If this set is under warranty you should return it to get it repaired/replaced by the seller at their expense. Let it be their headache.

defective y driver lower board

usually is an issue with the power supply or power inverter for the tv. basically one of the capacators is not holding a charge like it should and is causing the power to drop. contact a repair technition or begin looking for a new tv.

You need a VGA cable (15 pin) connected from PC (monitor out) to the PC input on the HDTV (15 pin) this is for the video. For the audio, connect from PC to HDTV, audio cable, either 3.5mm from earphone out on PC to HDTV 3.5mm audio input (next to PC VGA input) and also be sure to set PC screen resolution to compatible output for HDTV like 1024 X 768 or 600 x 800 etc.



Select the PC input on the HDTV using TV remote.

Hope this helps.

Electrical short, which has fried the MOSFETS... Normally these are meant to "break" and not allow any more voltage through, in this case they have broken and fused, still carrying voltage.
This is not cost effective to repair as many parts have been effected.

Hi fssidhom,

This is an indication of out-of-regulation in the power supply section, that's why you encountered the start-up problem. The very common caused of this fault is the leaky electrolytic capacitor in that section. It will drop the supply from normal voltage and will disable the unit.It needs a little warm-up to make itself stable but the symptom will get worst. Sometimes it has a bulged/dome at the top but not all, it is better that you have a capacitor checker/tester to determine its condition. Your unit will back to normal again if the leaky capacitor is isolated.

If you don't have necessary tools and test instruments, and can't do the job yourself, I would advice you to look for a professional to troubleshoot the problem. Don't attempt to work in the power supply if you don't know the safety precaution of handling it, there some stored electricity enough to hurt you with a little mistake only.

Also check if your unit is under warranty /extended warranty, avail it because the manufacturer of your unit will fix it for free. Don't open the back panel, this will void the warranty.

Hope I helped you.

Have a nice day!

Thanks for using Fixya.

This model was known for issues with the Y-sustain, Y-drives, and the Z-sustain boards. These boards help process the picture image to the screen.

When one or more of these boards fail, the screen stays black, and you only have audio & on/off.

You could call LG and try to get your TV repaired at a discount if you can convince LG to honor this known issue.

Another issue could be the actual panel has gone bad. The plasma panel in your TV has a two warranty and LG would fix that for free. Well…it would be free as long as it’s not past two years of your date of purchase.

What zip code are you in?

Probably some bad capacitors in the power supply or inverter/RF circuitry for the back-lights.
look for electrolytics with the top bubbled up on them, or bulging plug at the bottom or leaking electrolyte...these caps all need to be replaced.

Ur tv are to much zooming in mode.Look on the remote control for a button that said like VIEW MODE,ZOOMING,PICTURE SIZES.Press one of these buttons to changes ur tv picture sizes.

Are you using a cable or satellite box to provide the signal to the TV? If so there will be a setting in the box that is probably set for the closed caption. Unless you are on the TV tuner input portion of the TV it will not allow you to adjust the closed caption setting.

you are describing a power supply defect. IT may be as simple as the main fuse. I believe the one in this set is a 6.5 amp located on the ps board right by cord connection. IF after replacing the fuse opens a second time you will need to replace the power board.
p[lease leave feedback

Hi, you can try tightening the ribbon cables that run from the screen to the buffer board , only tighten the one near the line area. if this does not help you probably need a new buffer board or panel (screen) I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

You can try to get the processor to do a cold start. To do this, unplug the power from the set - turning it off is not enough, you must unplug it!

After 15 minutes, plug the set back in and try to power up. If it works OK, you are good2go!

If that did not work, your set probably has a power supply problem. The best option if it is under warranty is to exchange it.

If your warranty has expired, find a good TV repair shop and ask for an estimate before going any further.

Good Luck!

Hi, this could be a problem with the power supply in the tv, it is common especially on some Samsungs and specific repair kits are available quite cheaply if you have good soldering skills, this can also apply to many other Flat Screen TV's .

Usually this is caused by capacitors that have dried up and split, you can normally tell as the capacitors are bulging on the pcb, you can get them in a kit as I said eBayer's sometimes do them or you can buy them indivually from a good electronics components supplier, make sure you get the correct values for each!! marked on the side of the capacitors in xx/x V, xxx/x uF and 105oC. (the x's represent numbers)

The picture below shows the type of theing that happens, the brown ones are bulging/split on the top whereas the black one is fine.



High Voltages can exist in these sets, never attempt anything while plugged in and
if in doubt do not attempt it yourself and seek the advice of a qualified TV Technician.

There could also be dry solder joints on the panel, usually applies to the power supply as it's mainly these get the hottest.

Here's an example of what dry joints look like.....



High Voltages can exist in these sets, never attempt anything while plugged in and
if in doubt do not attempt it yourself and seek the advice of a qualified TV Technician.


It's also worth considering claiming under the warranty for replacement or repair through you dealer if warranty is valid.

Hope this helps

Midge.

Hi Sharon,

Here are some solution that may help you fixing the problem. You might need a help from guys that can perform steps below.

I'm assuming that your outlet is live.1.Power cord - check the cord it might be opened (no continuity).This is due to frequent bending,pulling. 2. Power switch - check for dry joints, open contact. 3.Check the internal fuse- sometimes the fuse fail because of the power surge, replacing with new one will cure the problem, If this is the case I've advice you to use surge protector/AVR (Automatic Voltage Regulator). However if the fuse blew again this is an indication that you have a shorted parts on the power supply, you may visit the link http://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info. If no reaction and still the unit didn't power up then you have an open parts on the power supply.

4.If you see that the fuse is intact on the board, don't attempt to touch anything because there somefatal components stored electricity enough to hurt you with a simple mistake only.

The next steps should be done by an expert or qualified technician because isolating the problem on the power supply is quite technical.

Also check if your unit is under warranty before opening the back panel, it will void the warranty. Avail it because the manufacturer of your unit will fix it for free or a little charge only.

Hope it may help you.

Thanks for using fixya.

JDVillanueva

Sounds like a power surge at your house has blown the tv.
Call out engineer and bill the electricity company. (maybe best to call them first though)

REPLACE THE Z-SUS BOARD LG 50PG20 ZSUS BOARD EBR38374502