Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

We'll see, that would be 1130pm.

ACK! Late night.. I am usually in bed by 1900..

OK, I'll look for ya and follow up if I have a spare board.

Thanx again...

[tw2005]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

ACK! Late night.. I am usually in bed by 1900..

OK, I'll look for ya and follow up if I have a spare board.

Thanx again...

Tom's usually around and has plenty more experience with these, either way it sounds like you have something a little different so it'll be interesting to follow.

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

OK, I don't have an exact part, but I do have a part that physically fits the connections.

It came off of a PN42C Sammie..

The green is the correct Logic Control Board. The red is the one off the PN42C

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

Well, I found two Logic Boards that had the same physical connections. Each one put the TV into protection mode (Green LED 2 sec off 5 sec on)...

I ordered a replacement Logic board identical to the one in there, but it won't likely be here til Mon or Tue...

I'll follow up then...

Thanx again to all for the great assistance..

[tom66]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

Can't use the 42" board in a 50" set.

The 50" board is hard to get but you might be able to swap firmware chip from boards over, this will only work if the fault is not with that board of course.

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

Can't use the 42" board in a 50" set.

I have a Panasonic 50" Plasma that is working fine.. If it has a comparable Logic Board I could pull it out to test the Sammie...

On the other hand, I hesitate to mess with a working set and I have already ordered a replacement Logic Board....

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

What do ya think of the issue, Tom?? All the voltages check out so TW seems to think it's the Logic Board as the culprit..

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

OK, got the replacement Logic Board in...

As Samuel L Jackson said in JURASSIC PARK....

"Hold onto yer butts.."

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

No go..

Same result as before with a few minor changes..

First off the rapid click-click-click on the Y-MAIN board is back... And I get a hi-voltage hum from both the Y and X Main boards..

The Logic Board is not identical to the one I have. It has the exact same connections in the exact same place but the new board has a 2nd LED right next to the existing one.. With the new board, that new LED blinks 2 or 3 times and then the other LED goes into the 1 per sec blink...

That's the extent of what's happening... You can see it here

http://sjfm.us/temp/PN50B4-2.3gp

I couldn't figure out how to attach a 3gp file, so I used a link..

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

Since all the voltages appear to check out, I am left with taking my best shot on replacing the boards...

My usual step would be to replace the Main Power PCB first.. But the fact that it seems to be putting out the right voltages gives me pause...

If anyone had to guess, would they put their money on the Power PCB or the X/Y Mains??

Thanx

[tw2005]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

Since all the voltages appear to check out, I am left with taking my best shot on replacing the boards...

My usual step would be to replace the Main Power PCB first.. But the fact that it seems to be putting out the right voltages gives me pause...

If anyone had to guess, would they put their money on the Power PCB or the X/Y Mains??

Thanx

Last guess turned out wrong. I'd hate to have another. I guess you tried the test pattern test from the new logic board? checked the buffer boards for shorts? Checked all fuses including any pico fuses(if any) on x and y mains?

I'm at a bit of a loss with this one. Sorry.

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

Last guess turned out wrong. I'd hate to have another. I guess you tried the test pattern test from the new logic board? checked the buffer boards for shorts? Checked all fuses including any pico fuses(if any) on x and y mains?

I'm at a bit of a loss with this one. Sorry.

No apology necessary.. I have learned a lot...

Yea, I tried the test pattern thing per your comment #10.. Still the same effect...

I tried a visual inspection for shorts, but not an electronic check.. Is there a set process for that?? Or just random checking connections?? As for pico fuses, let me check that. Is there a standard board label that identifies pico fuses??..

Thanx again...

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

If I were to purchase a scope that would allow me to troubleshoot more effectively, what would you recommend??

With an eye on affordability??

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

No apology necessary.. I have learned a lot...

Yea, I tried the test pattern thing per your comment #10.. Still the same effect...

I tried a visual inspection for shorts, but not an electronic check.. Is there a set process for that?? Or just random checking connections?? As for pico fuses, let me check that. Is there a standard board label that identifies pico fuses??..

Thanx again...

Assuming that the fuses are marked on the board with an Fxxxx designation (as the big fuses are) there doesn't appear to be any pico fuses on any of the boards...

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

If I were to purchase a scope that would allow me to troubleshoot more effectively, what would you recommend??

With an eye on affordability??

What about something like this??

http://www.ebay.com/itm/ARM-DS203-Na...item337956f436

[Michale32086]

Re: Continuing Education Checking Voltages PN50B430P2DXZA Sound Nothing Else

OK I am at a cross roads here with this unit...

Wanted to solicit some advice...

As I see it, I have 3 choices...

#1 Buy a replacement Y-MAIN board...

#2 Wait until I acquire a scope and then run some more trouble shooting...

#3 Shelf the unit and wait until an identical model with a busted display comes in...

Regarding #1... From all I have been reading, the symptom I have (sound, no display) is a likely fault of the Y board... I can replace the Y board for around $100 +/- $30.. I have $75 into the unit to date ($60 for the unit, $15 for the Logic Board)... Putting another $100-$130 into it would still be an economically viable decision, but just barely.. So, if the consensus that the chances are good that a new Y board will fix it, I am willing to go that route.. My only other concern is that I have read that sometimes you must replace multiple boards as putting a good X board in with a bad XX board could result in another bad X board.. So, in this particular case, should I opt to replace multiple boards in the blind??

Regarding #2... If it's likely that I can locate the bad area with the afore listed scope and it's likely I will have a scope (one way or another) within a week or two, then the logical choice would be to hold off on buying any parts...

Regarding #3... Of course, getting a clone unit with a bad display would be the most ideal situation.. And it's not so far outside the realm of possibility as one might think. I usually get in around 2 dozen +/- TVs a month with various issues. So it's possible I could see a clone within a few weeks... Having said that, patience is not one of my virtues..

"Patience isn't one of my virtues. Well, I don't have any virtues, but if I did, I'm certain that patience wouldn't be one of them."
-Crowley, SUPERNATURAL



Anyways, just wanted to solicit some advice...

Any hints or tips would be appreciated...