Samsung HP-T5054X/XAA

[Samsungsucks]

So my story begins with purchasing a Samsung 50" Plasma Television in 2007. In 2013 my television started power cycling. I contacted Samsung and although television was out of warranty they agreed to change out power board since my television was listed as one in which they had put in the faulty bad caps. The year and model where also listed under the lawsuit against Samsung. In September 2013 Samsung arranged repairs through a local repair company and the power board was replaced. Television was working find until February 2014. Now the television begins to power cycle again after 15 minutes of normal viewing. I contacted Samsung and this repair is on me. My questions:

1. If I replace power board again I feel like I will most likely get a power board manufactured for Samsung which will have these faulty caps. Am I correct in this thought?

2. Since my first power board lasted 5 years, why did the replacement power board last only 6 months?

3. Can I remove the power board and take it to a repair facility and have them test out the caps? also replace the caps?

4. Which caps would be best or am I just doomed and better off to buy a new television?

5. Any reference to a good repair facility in my area? Sacramento, CA

Thank you

[Samsungsucks]

Re: Samsung HP-T5054X/XAA

Please provide some guidance for I am really frustrated with Samsung.

[tom66]

Re: Samsung HP-T5054X/XAA

If you post a picture of your power board, we may be able to spot any faults, such as failed capacitors.

When the problem happened first, was it gradual (TV was hard to turn on, then eventually would not) or sudden (would not turn on at all)? Is it different now?

[tw2005]

Re: Samsung HP-T5054X/XAA

It will be a SAMSUNG board, they made them. All depends if it's been repaired/refurbed by someone who used quality caps.

Who's to say you got a new board or has the same fault.

Does it always shutdown after 15mins or is it variable?

They can also have bad solder joints on the FETs on those heatsinks and can intermittently shutdown or cycle.

The one I had it was the long thin heatsink in the centre of the PSU where the solder joints were bad.

Might be worth reflowing those first. I have seen one go up in smoke when cycling so it may be a good idea to get it attended to now before a simple repair turns into a bigger more expensive one.

Even if you know somone with a soldering iron and reflow them yourself. Worth a shot and if the caps are really bad they can bulge but a bad cap can look externally normal.

7 years is pretty good, these also quite commonly blow the upper y buffer and the Ymain boards.

[Samsungsucks]

Re: Samsung HP-T5054X/XAA

Tom it just started happening. No warning and no difficulties turning it on and off.

I pulled the back of the television and could not find a single cap bulging, burnt or look out of whack. I plug the television on to see if I could see a spark or a cloud of smoke and I saw nothing.

If I allow the television to sit and not be turned on I can watch normally for about 20 minutes before it starts cycling. It does not matter if left plugged in while sitting or not.

TW205 thank you and I figured as much with the replacement boards. The power cycling varies as for when it begins but is normally within 15-30 minutes.

As for the heatsink I don't even know where to begin but it is wise to take the board into someone and have them do a once over?

Looks like I may have some scrap and time to buy a $500 lg or vizio. No since paying 2k for another one that does not last.

Thank you all for you responses

[Samsungsucks]

Re: Samsung HP-T5054X/XAA

TW205 if it blow the Main or Ybuffer boards would I still have a picture? The television just turns off then with a minute or two turns back on. Then about a minute or two later it turns off and it continues on the cycle but I always have a picture when it turns back on.

[tw2005]

Re: Samsung HP-T5054X/XAA

The difficulty I'm having giving advice with this is there's no certainty I'm right. Process of elimination so if you take it somewhere, are you going to be taken for a ride, how much are they going to charge, would it be just economical to just get another or send yours in to someone like Coppell Tv who offer a repair service online??

I think some very clear sharp shots of the board may show something especially the solder joints on the underside. You never know there are some very experienced eyes on this forum.

reflowing the joints is not beyond a complete beginner, just a matter of reheating the joint to get the solder to flow, ideally some fresh solder added would be of benefit.

the fact it start shutting down after it gets warm does make me think it's a cracked joint.

I've marked the heatsink i had issues with 4 devices attached to it with bad joints.

[tw2005]

Re: Samsung HP-T5054X/XAA

TW205 if it blow the Main or Ybuffer boards would I still have a picture? The television just turns off then with a minute or two turns back on. Then about a minute or two later it turns off and it continues on the cycle but I always have a picture when it turns back on.

No I only mention that as another problem these have. I'm putting the mockers on you a bit, given it's age you could invest money in the PSU and then have the ymain/buffer fail in the near future or could last for years yet.

I really think it sounding like bad joints, reaches a certain temp goes open cct, cools makes contact again, then runs until it reaches the same temp, joint expands open cct etc etc.

That's only my opinion.

[Samsungsucks]

Re: Samsung HP-T5054X/XAA

TW205 definitely feel putting too much money into this thing is not worth it. At this point I feel any repair over $100 is too much...lol

Anyways great pic and I will pull the board out tomorrow and take some pics to test those eyes you mentioned.

Thank you again for you responses

[tw2005]

Re: Samsung HP-T5054X/XAA

TW205 definitely feel putting too much money into this thing is not worth it. At this point I feel any repair over $100 is too much...lol

Anyways great pic and I will pull the board out tomorrow and take some pics to test those eyes you mentioned.

Thank you again for you responses

just be aware of stored high voltages in those larger CAPS. Should be ok if unpowered overnight.

[splitcrete]

Re: Samsung HP-T5054X/XAA

I had the same set and problem,and it was the small cap right under the two big caps center of board left and lower of fuse. The cap looked good but when tested it was dead.
Hope this helps you.

[freakaftr8]

Re: Samsung HP-T5054X/XAA

That tv has well known issues with cold solder joints in the power supply. Dealt with two of them back to back last year. Same issue. Different areas of the power supply thou

[vinceroger69]

Re: Samsung HP-T5054X/XAA

http://www.youtube.com/watch?v=za3EixgxBkk this video may help you

[Samsungsucks]

Re: Samsung HP-T5054X/XAA

I have been trying to post pics but no success. I do not see any broken soldering joints. Which leads me back to the capacitors

Vincent great video and it helped but all posts seems to be firmly seated.

Is it possible to take the power board into a shop to have it checked or do i most likely need to take the whole television?

[Samsungsucks]

Re: Samsung HP-T5054X/XAA

I noticed also that i am missing a metal seat for one of the mount screws. Could this be part of the issue?