Samsung pn50a550 click of death. Help appreciated. - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 12 Old 07-11-2011, 04:43 PM - Thread Starter
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I have a 50 inch plasma Samsung tv. Model numbern50a550s1f. When I plug the TV into a wall jack it automatically starts trying to turn on. A series of clicks occur but the TV can not start up. If I keep it clicking long enough I hear a high pitch noise, almost like a siren.

I have researched this pretty thoroughly and found a common power board problem minus the noise. So I go to ebay and purchase a power board. Replace it and the wires and same problem. So I return the power board. Frustrated on no new leads I could find I purchased another power board thinking they may have sent me a dysfunctional board. Same problem.

There isn't much info on the logic board that I can find. I can't find a service manual for the tv either. I have 2 blinking lights while its trying to power on on the logic board. I'm not sure if that is normal or not. Does anyone have any suggestions or input?

Also previously I would get a screen of colorful lines every once in a while. I haven't seen the screen in about a week of trying to fix it though.
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post #2 of 12 Old 07-11-2011, 07:13 PM - Thread Starter
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Well, I try to start the tv every once in a while and it just started up with the original power board and is staying on thus far. However I know it will have trouble as it has worked before for a few hours like this. So i guess whatever is faulty isnt completely faulty since sometimes the tv actually works.
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post #3 of 12 Old 07-11-2011, 07:57 PM - Thread Starter
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Just as I thought, as I had it on it all of the sudden made a really loud noise and the screen changed to vertical colorful lines. The lack of information on the internet about this is frustrating. I guess Ill have a tech look at it.
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post #4 of 12 Old 07-13-2011, 12:38 PM - Thread Starter
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Called Samsung to see if there was any kind of manufacturer defect with the tv. The guy said that since it is a plasma it doesn't have any capacitors. I had to get him to tell me twice to think I was hearing right. Anyways, going to have it inspected now
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post #5 of 12 Old 10-21-2011, 11:01 PM
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Did you solve the problem? I have the same TV with the same problem.
Thank you,
Alex



Quote:
Originally Posted by gajohnboy View Post

I have a 50 inch plasma Samsung tv. Model numbern50a550s1f. When I plug the TV into a wall jack it automatically starts trying to turn on. A series of clicks occur but the TV can not start up. If I keep it clicking long enough I hear a high pitch noise, almost like a siren.

I have researched this pretty thoroughly and found a common power board problem minus the noise. So I go to ebay and purchase a power board. Replace it and the wires and same problem. So I return the power board. Frustrated on no new leads I could find I purchased another power board thinking they may have sent me a dysfunctional board. Same problem.

There isn't much info on the logic board that I can find. I can't find a service manual for the tv either. I have 2 blinking lights while its trying to power on on the logic board. I'm not sure if that is normal or not. Does anyone have any suggestions or input?

Also previously I would get a screen of colorful lines every once in a while. I haven't seen the screen in about a week of trying to fix it though.

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post #6 of 12 Old 11-12-2012, 12:42 PM
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I would love to hear the end of the story. My PN50A550 started having issues recently.

When I turn the TV on from a cold boot (meaning it's been off for a number of hours), the TV will turn on and the screen will display the input (say the XBOX), but only in one color, such as blue, and with lots of vertical lines. Then the TV will click off, and click back on again. Sometimes it will have the same problem, but with green lines, then red.

It has to do this restarting process one to three times. If the TV had just been on, it doesn't seem to have this problem.

I, too, am thinking of changing the power board, and it only sounds reasonable (I experienced a power transformer problem in a Marantz receiver. Power always seems to be the first component to go in long-lasting electronics).

Thoughts?
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post #7 of 12 Old 11-13-2012, 01:54 PM
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I had this happen to my 50A550 back in 2008 (thankfully still under warranty). The issue was the main board. The TV shop that did the work literally replaced the entire TV piece by piece over the course of 3 months trying to fix the issue. The X and Y boards, power supply, and even the panel itself was swapped out with no improvement before they replaced the main board. It was literally the only component left to swap out in the whole TV at that point. Once the main board was swapped the problem went away and I have had no issues since.
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post #8 of 12 Old 12-31-2012, 11:55 AM
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My TV also had the click of death.

The main board, nor capacitors need replaced.

The fix is simple:

1. Unplug the TV
2. Hold the power button for 15 seconds (clears stored power in the capacitors)
3. Plug in TV
4. Turn on.

Voila.
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post #9 of 12 Old 09-28-2013, 05:32 PM
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Hello everyone,

I just picked up a samsung plasma (hpt4264) on craigslist for free because it has been experiencing the "click of death". I did some research already and many people said that a blown capacitor is probably the problem. So I took apart the TV but all the capacitors look pretty good to me (no bulging or leaking). The clicking noise is definitely coming from the power supply and I noticed that it also looks like one capacitor was already replaced, but I tested it with a multimeter and the rating seems fine. I tested a few other capacitors and they either read a number within 10% of their uf rating or some of them read a rating almost double (not sure if that means I'm doing something wrong or they could be bad.) The clicking is definitely coming from the power supply unit and the symptoms aren't exactly the same as everyone elses. What happens is the TV will turn on after a few hours rest but will then shutdown and start clicking after a minute or two. It is then impossible to turn the TV on until you give it another rest. The clicking is also 100% coming from the power supply. I am also attaching pictures of the psu. PLEASE HELP!

 

 

 

 

 

 

 

 

 

 

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post #10 of 12 Old 01-17-2014, 12:34 PM
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Mine had the same problem.

The problem with mine was not the power supply but the CPU board.

The clicking is the power supply turning on and off again trying to get the CPU working.

 

My solution was to re-ball the CPU with tin/lead solder balls and to replace the lead-free DDR2 memory chips with tin/lead replacements.  I could have re-balled the memory but replacement parts were about $20 for the set from Digikey (pn 557-1616-ND) so I didn't think it was worth my time.  Yes, it is a different part number than the Qimonda devices on the board but it seems that DDR2 is pretty standardized.

 

I just got it up and running this week so we'll see how long the repair lasts.

 

 

 

 

 

 

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post #11 of 12 Old 05-29-2014, 02:45 PM
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I'm still using my PN50A550, despite experiencing power up issues for almost two years now. I had it calibrated by Jeff (UMR on these forums), and he did such a good job that I'm reluctant to replace it (let alone foot the bill for a new TV).

From a cold boot, the TV takes about 10 minutes to turn on. The TV clicks on and off a few dozen times going through several phases before finally displaying a clear, steady picture:

Phase 1: TV clicks on and off, no picture
Phase 2: TV briefly displays perfect picture, then returns to clicking on and off
Phase 3: TV clicks on and off, but now starts to begin what I call its warm up process
Phase 4: Green screen with lots of neon green lines running vertically
Phase 5: Cyan screen with lots of light pink lines running vertically
Phase 6: Normal picture displayed in odd colors
Phase 7: Clear, stead picture. TV turns on and stays on.
Total Time: ~12 minutes, depending on when the TV was on last

We're all aware that Samsung screwed us royally with these TVs, so much so that a class action lawsuit was claimed and settled. Unfortunately, Samsung agreed to many of their models, up to but NOT including the PN50A550. Though this TV clearly suffers from the faulty capacitors they decided to skimp on, contacting Samsung illicited the "you are SOL" response.

As it stands, I'm thinking I should swap out the main board.
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post #12 of 12 Old 11-27-2014, 09:08 PM
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Hello Everyone,

The thread at the link below discusses the replacement of a capacitor on the main board, which has repaired this issue on multiple models. I was focused so intently on the common power supply issues that when I removed my PN58A550S1FXZA from the wall, I just knew that I would find some bulging caps and be an easy fix. No. My PS board showed no signs of failures, no matter how hard I tried to make something of nothing.

I finally started removing power supply issue results and came upon the thread linked below. One specific capacitor C102 (not labeled on my board) which is easy to locate based on the images available. Anyway, 1 week after replacing the capacitor, the TV is still working perfect!!

Sure hope that this helps others with this issue. I cannot post links, so the site is badcaps dot net thread #32061

The part I used for C102 on the main board BN94-01880E from Digikey
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