Insignia ns-42pdp (lg pdp42x30000)

[DaveL]

Hi,
I'm new at this..disabled and bored to death!

I was given a 42" Proscan last month which I got working with replacing 4 capacitors...YAY ME!

Well, now I have an Insignia 42NS-PDP (LG PDP42X30000)...
From just looking I see that a plazma is a different creature than the LCD/LED...

I don't see and bad caps so far...so there goes my easy fix!

When plugged in I have the red stand by light on..
Hit the power and it goes to blue..
I can hear humming from the lower end of the Y SUS board..
I have no picture or sound (I may have sound but with nothing showing I just hear the speaker power up)
It will stay on for about 4-5 minutes and then shut itself off..
The small aluminum heat sink on the left side of the Y SUS board gets hot..

I have unplugged both the Y and Z boards from the power board and there is no difference..still no pic.

What should I look for to repair this plazma monster?

Let me say Thanks before hand for any assistance you can guys can give me..

Dave

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

In a dark room, can you see a faint glow from the screen when the TV is powered up?

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

I didn't check but I will and get back to you with the results..

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

Nope..nothing at all.

And the green light on the power board never comes on...

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

b

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

b

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

Ok, do you have a digital multimeter available?
Start by locating the Vs and Va supplies - check the voltages at those points and compare to the sticker on the back of the plasma panel.
(It will say something like Vs: 195V, Va: 65V, -190 / 150 / N.A. / N.A. / 85... every panel is different so always use YOUR panel sticker and not someone else's!)

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

Yes, I have a small one from Harbor Freight..will it be sufficient?

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

Yes that'll work.

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

On the power board I have found the Va and Vs adjustment pots...where will I get the readings at?

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

On the output connectors, the ones going to the sustain boards. They'll be marked Vs or Va on certain pins. You can press your meter lead against the metal sheath around where the pin and wire connect. You'll also have to connect the common lead (black lead) of your meter to the chassis of the TV - such as a hole in the back of the plasma panel. Compare your vs and va to the sticker on the panel. Use highest available DC volt range (do not use AC range)

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

Ok..the sticker shows Va @ 60...Vs @ 186..My readings were Va @ 59 and Vs @ 184 on both connectors

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

That's good then, time to focus on the Y-sustain & Z-sustain then, could you supply a picture of those boards?

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

sure..give a few minutes.

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

Y and Z

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

Any way you can get some bigger photos - I need to be able to see the small test points...

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

Z board

[tom66]

Re: Insignia ns-42pdp (lg pdp42x30000)

Unfortunately we really need good pictures to see what might be worth testing... is there any chance you can borrow a better camera...?

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

Y board

Are these any better?

[DaveL]

Re: Insignia ns-42pdp (lg pdp42x30000)

b