LG 50PA5500 Plasma - No picture then no sound

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

I replaced the entire power board and it still does not work.

What's next?

[freakaftr8]

Re: LG 50PA5500 Plasma - No picture then no sound

the only thing I can think of is if you have power supply voltages coming up check out the buffer boards for shorts and look at the very top y ribbon cable going into the panel for a crack from a known defect in the plastic casing rubbing against the ribbon cable easiest way is to remove the upper buffer board and power of the TV and if you get a grey screen on the bottom then your boards and power supply are working

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

....

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

Anyone?

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

I replaced the cap, but it still did not work. The voltage readings are exactly the same.

What's next? New power board?

[tom66]

Re: LG 50PA5500 Plasma - No picture then no sound

If you have the same symptom chances are that cap will fix the issue.

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

Sounds like your power board is bad. Are all fuses good on the board?

Double checked the fuses, they test good.

Do I need to replace that capacitor discussed earlier or the entire board?

[Fwrothy]

Re: LG 50PA5500 Plasma - No picture then no sound

This thread:
https://www.badcaps.net/forum/showth...t=38197&page=2

Psu fix worked- hope it's the same problem for you

[nicholas1110]

Re: LG 50PA5500 Plasma - No picture then no sound

I have had 50pa4500 (same power supply) with no vs voltage. I replaced the power supply, but it looks like shopjimmy has a repair kit now for this board as well. If the tv turns on, and doesn't shut back off right away? Maybe this repair kit can fix the no vs issue. I've had probably 5 of these come through with bad upper buffer board from a shorted panel ribbon, but all of those still had proper vs and va voltages.

[tom66]

Re: LG 50PA5500 Plasma - No picture then no sound

This thread:
https://www.badcaps.net/forum/showth...t=38197&page=2

[Fwrothy]

Re: LG 50PA5500 Plasma - No picture then no sound

Uh- huh. Check out the thread for the lgpa504500 started by brentsky. That's what I'm working on. Very similar set, same psu... You have gone down a slightly different path in the troubleshooting but...
I haven't done any extensive testing yet, hoping for the 'quick fix' based on the information from that thread.

[tom66]

Re: LG 50PA5500 Plasma - No picture then no sound

Sounds like your power board is bad. Are all fuses good on the board?

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

Part number is EAY62609701

[Fwrothy]

Re: LG 50PA5500 Plasma - No picture then no sound

This is sounding like the same issue I am having with an LG 50pa4500...what's the psu part #?

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

They are always low, so does that mean I have a buy power supply?

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

When turning the power on
Vs goes from 002 to 014
Va goes from 001 to 008

[tom66]

Re: LG 50PA5500 Plasma - No picture then no sound

Can you check and see if those go up to about 200V and 55V each when first powered up then drop down, or if they are always that low.

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

With the Y-sustain board disconnected and the TV off, Vs 002 Va 008.

I was wrong, I got this result with the TV on.

Vs 002
Va 008

What's next?

[sordids999]

Re: LG 50PA5500 Plasma - No picture then no sound

The 50 inch LG i just repaired on mine red means standby

[Mac 108]

Re: LG 50PA5500 Plasma - No picture then no sound

Anyone have any idea what the red light means?