Samsung PN60E530A3F unresponsive

[Randomtest]

This is a Samsung PN60E530A3F Plasma. There are several threads here on this TV where the startup sound will play but there is no picture. This TV did have that problem, but before I could get around to applying the fix that I found here on this forum, a nearby lightning strike made the problems worse. Now the TV will not respond at all. The only sign of life is the blinking green led on the logic board.

So before the lightning strike, I had planned to replace four components on the Y-main board to fix the intermittent startup problem (from this thread). U5014, C5046, C5160 and C5162.

I have now found one additional problem (pointed out in another thread). Resistor R5027 on the Y-main board measures at a varying 2M-3.5Mohm while in the board. I "think" it is supposed to be 100k. To be honest I am not sure if that is a red or brown stripe, pic below.

But I am not sure what type of resistor to buy. The other thread mentioned a fusible resistor, but this one doesn't have a white or blue body. And if it is not fusible, what kind should I order? Wire, film, carbon etc. I never knew there were that many types

I checked all the mosfets for shorts and did not find any obvious problems.

So that is everything I think I know. The rest are measurements and things I hope might be useful...

VS 211v (tag says 211)
VA 56.8v (tag says 57)
VSC -0.7v (tag says -198)
VE 10v (tag says 98)

PS_ON 3.2v, this stays at 3.2v while the set is plugged in.
VS_ON 0-3.5v, this jumps to 3.5ish when plugged in and quickly drops to 0v.

The logic board led blinks at 4 second on, 1 second off when all boards are connected. With the Y-main disconnected, the led blinks at 1 second intervals (I think this is the good signal?).

I tested the Y-buffer boards for shorts and did not find any.

I do not see anything obvious with the Main board, but with no signs of life I am wondering if maybe there is an issue there?

I do not see any cracks in the screen.

At no point is there any sign of life on the screen and the front led does not light up.

Do you think the problems I noted on the Y-main board are enough to cause no response from the TV? Or am I looking at bigger problems?

If I can find out what type of resistor to buy, I am thinking of starting there and see what happens.

Thanks in advance for any advice!

[Andrew F. Ali]

Re: Samsung PN60E530A3F unresponsive

Vsc is generated from the Y-Sus Bd and the Ve is generated in the Z-Sus Bd. If Y-Sus has a problem then Z-Sus will fail, too. I think that resistor is a100k Ohm resistor. Can you source a working Y-Sus Bd?

[Randomtest]

Re: Samsung PN60E530A3F unresponsive

I did find a Y board at shopjimmy, but it is $120. I hate to spend that when i still have doubts about the other boards.

Thanks for the confirmation on the resistor. I did find two others that are identical on the board and they measure 100k. Don't know why I didn't think to check that before!

[Andrew F. Ali]

Re: Samsung PN60E530A3F unresponsive

Well. Replace the U5014, C5046, C5160 and C5162 as you had planned and now the 100k Ohm resistor and give it a try, since you are absolutely sure every thing else on the Y board, Z board and the X board checks out and the fuses on the Y and Z Bds are OK.

[freakaftr8]

Re: Samsung PN60E530A3F unresponsive

You could start with applying some heat from a hairdryer around those blue capacitors and U5014 and see if -VSC comes up.

[Randomtest]

Re: Samsung PN60E530A3F unresponsive

Ah! That reminds me that I did try to freeze the Y-main, but I only tried turning the TV on. I did not check voltages while it was cold.

I will try heat and cold this evening to see if there are any changes.

[Randomtest]

Re: Samsung PN60E530A3F unresponsive

Update!

I did try heat and cold on the Y-main with no change.

But my components came in this afternoon and I replaced the chip, caps and resistor on the y-main. All of the voltages are now correct and stable! The Vsc was a couple of volts low but a quick adjustment and it is right on the money.

Also, the logic board now blinks the happy 1 second flashes with all boards connected.

Unfortunately the TV still will not turn on

I found a reference to jumping two locations on the logic board to run test patterns. I tried this and as soon as it is plugged in the screen starts going through red, blue and green patterns. So at least the screen is good.

Is the mainboard the only thing left? I did notice that the light in the optical port is intermittent, sometimes it will light up when plugged in and other times it will not.

Also, I noticed a very faint electrical hum/buzz coming from somewhere on the X-main. I am not sure if I would hear it with the back panel in place. Is that normal or should I investigate further?

Are there any tests I could perform on the mainboard?

I am not sure where to go from here.

[ljintexas]

Re: Samsung PN60E530A3F unresponsive

If test patterns are good..Its a bad main board.

[Quietwind]

Re: Samsung PN60E530A3F unresponsive

[QUOTE=Randomtest;816792]
I have now found one additional problem (pointed out in another thread). Resistor R5027 on the Y-main board measures at a varying 2M-3.5Mohm while in the board. I "think" it is supposed to be 100k. To be honest I am not sure if that is a red or brown stripe, pic below.

But I am not sure what type of resistor to buy. The other thread mentioned a fusible resistor, but this one doesn't have a white or blue body. And if it is not fusible, what kind should I order? Wire, film, carbon etc. I never knew there were that many types

]


Resistor illustration appears to be brown, black ,yellow , gold as you suspect 1/2 watt Metal Oxide Film. I suggest you take it out of circuit to be sure. Rather unlikely it is the source of your problem. It will usually be very noticeable failure with signs of blow out.

Maybe that helps