LG 60pb5600 plasma TV turning off after sound is initiated on startup. I thought that this was the YSUS board so replaced it with a new one. Unfortunately, there was a popping noise and then the TV returned back to this original problem. After research, I figured that I should had also replaced the Y-Buffers at the same time as the YSUS. Ordered these three new boards from Sears but, once installed, the problem persists. No popping noises or anything though. It powers up when I push the button and once the sound comes on it immediately turns off? Any ideas? I should also add, the reason I originally thought that it was the YSUS is because the tv power will stay on if I disconnect the YSUS board connection from the ZSUS(The YSUS power is routed through the ZSUS on this TV).

SOURCE: Loud pop Blank screen 42 inch Viore Plasma

Unfortunately, that board is the inverter board. And for this model the inverter board is only supplied with the the PDP panel. The panel is quite expensive, here's a link if needed:

LG 42PX5D Replacement Part PDP Plasma Display Panel

SOURCE: LG 42 Plasma try's to turn on but just goes back into "stanby" ?

Check to see if you get Va and Vs voltages from the power supply. There should be some wires running to the y-sus. A couple of those wires will be labeled va and vs. Are they present? There will be a sticker stuck to the panel somewhere telling you what they should be.

SOURCE: lg 42 plasma model 42pc3d-ud: had a really bad picture so

I Have An LG - 42PC3D-UD, When I Turn It On "It Have Sound And A Very Bad Picture.

SOURCE: I have an LG 42px5d

You might wish to unplug the TV for an hour or more. If this power reset does not allow the TV to turn on component failure is indicated. These sets are assembled using the wave soldering process they are known for having cold solder connections.

The safety circuitry shuts the TV set down or will keep it from turning on when it detects a problem. This model of TV has over 2,000 parts, which includes millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective. Resistors will change value and burn. Diodes and IC can go bad.

This may have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again if the parts that caused the failure to begin with are not replaced.

The only way to know for sure which parts that are no longer within factory specs and for a proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment specifically designed for TV service and the skills to use the test equipment. I wish I could tell you there was a quick fix or button to push that would fix the TV but that is not the case or the solution needed to get the TV operating correctly.

Plasma is very common for having a power failure issue. The problem resides in the Y-Sustain board in most cases. The HDTV Plasma Television also have the same issue as they all use the same PDP Panel (plasma panel).

Loud popping and loss of power is common on plasma TVs and is usually either the Y sustain or Z sustain boards or buffers; in these instances the damaged part will be quite evident.

If this is an LCD you might have degraded insulation on one of the pink/blue backlight power leads causing high voltage to 'arc' to the chassis.

The loud bang and smell is actually to your advantage as in these circumstances the damaged part is usually evident. It'll just be a matter of popping the back off and sleuthing around

That's the sound of your power supply going bad. You will have to have it repaired by a professional television technician.


Before making any purchases, please check the part and make sure it is what your TV needs. I am simply making recommendations and trying to point you to the right direction.

Thanks for using fixya..

SOURCE: lg-42px5d-eb tv made pop noise

I have a lg 42px5deb and i turned tv on there was a pop and the fuse had blown on the circuit board i replaced it and it happened again i have no idea what to do i have sound but no picture what so ever pleaseee help thanks