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Television blank screen, audio works

HPT5054X/XAA, blank screen, audio works. No bulging capacitors on any boards. Vs should be 230V, measures 12.2mV; Va should be 63V, measures 63V. How trouble shoot the power supply board? If replace it, how now if Y-sustain board is good? Other ideas?

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  • 563 Answers

A capacitor can still be bad even if it is not visual. basic tests can be done with a multimeter, only an ESR meter can truly test them. You would need to know the pin out to know where to check, but I would assume you are going to have various voltages exiting the board. Your two measurements don't add up if you aren't reading any voltage.

Posted on May 05, 2013

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: p50hdtv10a y-sustain and pcb

I had this problem with a different brand plasma and it turned out to be cracked or missing solder on the power board lead to y sustain. I removed the power board, desoldered the connection, clean it up and then resoldered the connection. Everything works great now.

Posted on Sep 27, 2009

  • 6 Answers

SOURCE: HPT5054 50 in. HDTV-Ready Plasma Television: Samsung HPT5054X/XAA - No picture, Sound OK, Have ...

It's not the x main. 90% of the time it's a y buffer that goes out. It's usually the top buffer. 3/4 of the time the buffer takes out the y main board too. You cannot just replace the y-main or buffer because it will just burn out the other within seconds. Also about 1/4 of the time it'll take out the top transformer on the power supply too. The solution? First disconnect the power to the y main board. turn on the television and check the voltages coming off of it. Careful it's high voltage 208V! Remember it's DC too. Then disconnect the buffers from the y main board. You can try powering the y-main up to see if the little LED lights up. This does not indicate it's working though but it'll tell you if it is possible to fix. The fixes for these boards is only for electronics guys. It usually involves replacing 1-3 capacitors and 1-4 FET's. Since a bad buffer can take out a good y main in seconds it's usually recommended that one replace all 3 boards at the same time. It's a $250 fix. How do I know all this? I've now repaired 5 of these televisions. I owned one and spent close to 600 repairing it. I bought misc parts and broken sets online for months before I had 2 different repair guys walk me through the process of repairing them. I had so much cash tied up in parts that I bought 3 more dead sets and repaired them to justify all my spending. I've never had an x board fail. I've had EVERY top buffer fail. I've had all but 1 y-mains fail. and 1 lower buffer fail. I've also had the y buffer fry it's top chip, blow a capacitor and FET on the y-main, and fry the top transformer on the power supply before my eyes. It only took 5 seconds. Replacement of the 3 y boards will almost always fix the sound but no picture problem. Hope this helps!

Posted on May 26, 2010

TV #1
  • 129 Answers

SOURCE: Samsung plasma hpt5054x/xaa California no sound no

If you got no picture replace the buffer boards.

Posted on Mar 20, 2012

gopakumarg43
  • 74136 Answers

SOURCE: 42"philips plasma 7 red blinking light.

7 blinks Driver SOS 2 SU / SD / SS Boards
(SC floating voltage area)
This is the fault indication meant by 7 blinks of standby light. Just visit this site 'Electro-help' Faults with plasma TVs are described in detail. Check this link and select the site. Pull up older posts there.

Posted on Jul 19, 2012

SD Tech
  • 14553 Answers

SOURCE: No Vs Voltage (200-210) out of a BN44-175A Samsung Power supply

if no voltage out either a short on the line pulling it down or its at the source--usually one or the other.

Posted on Aug 29, 2012

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I have a Samsung Model HPT5054X/XAA 50" plasma TV. the picture went black but still have audio.I purchased a reman Y sustain board.The Y buffer boards looked good. Now when I reassembled the unit,st


Did it work with the Y-sustain board replaced? Likely if it did not work then there is an issue with the capacitors on the Y-sustain board and the power board. Check these caps for failure and replace them with the exact type. Likely the caps are blown and cause voltage loss in one or both boards.

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JVC LT-24HD32J TV SCREEN GOES BLANK AFTER 10 SECONDS WITH JUST THE SELECTED CHANNEL DISPLAYED.


Good day!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

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2 Answers

No power on HPT5054X/XAA


My 1st question is, have you tried both the remote and the power button located on the TV? If the answer to that is "YES" then it's most likely going to be the PCB (power supply board). If that's the case, then there is good and bad news. The BAD... The original board (BN44-00160A)

has been discontinued. It can be purchased used for $40-$60.

Now, the good... There is a replacement that Samsung "says" works just fine. That board is BN44-00162A. That one is going to run around $150 for a new one.



Good Luck


Mar 10, 2012 | Televison & Video

1 Answer

Samsung LNT4661FX/XAA 46 in. HDTV LCD Television - When tv is turned on it makes a clicking noise for about 15-16 clicks. Progressively worse. Finally comes on


Capacitors are bad on the power supply board, they will probably looked bulged at the top. I've enclosed an example.
crikett_20.jpg

Jan 02, 2011 | Samsung Televison & Video

1 Answer

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Hold a flashlight 2 in from screen with on, see if you see a picture, if picture is there then it's your inverter board, if screen is not there then main board needs repair, start with looking for any bulging capacitors in the power supply and video board or main logic.

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"my samsung lns4051dx xaa powers on and the audio works, but the screen doesnt come on. please help "my samsung lns4051dx xaa powers on and the audio works, but the screen doesnt come on. please help


It can be T-CON board, 24vdc power supply, backlight inverter board, main board.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Please post back what you find.

Oct 23, 2010 | Samsung LN-S4051D 40 in. LCD Television

4 Answers

HPT5054 50 in. HDTV-Ready Plasma Television: Samsung HPT5054X/XAA - No picture, Sound OK, Have ...


It's not the x main. 90% of the time it's a y buffer that goes out. It's usually the top buffer. 3/4 of the time the buffer takes out the y main board too. You cannot just replace the y-main or buffer because it will just burn out the other within seconds. Also about 1/4 of the time it'll take out the top transformer on the power supply too. The solution? First disconnect the power to the y main board. turn on the television and check the voltages coming off of it. Careful it's high voltage 208V! Remember it's DC too. Then disconnect the buffers from the y main board. You can try powering the y-main up to see if the little LED lights up. This does not indicate it's working though but it'll tell you if it is possible to fix. The fixes for these boards is only for electronics guys. It usually involves replacing 1-3 capacitors and 1-4 FET's. Since a bad buffer can take out a good y main in seconds it's usually recommended that one replace all 3 boards at the same time. It's a $250 fix. How do I know all this? I've now repaired 5 of these televisions. I owned one and spent close to 600 repairing it. I bought misc parts and broken sets online for months before I had 2 different repair guys walk me through the process of repairing them. I had so much cash tied up in parts that I bought 3 more dead sets and repaired them to justify all my spending. I've never had an x board fail. I've had EVERY top buffer fail. I've had all but 1 y-mains fail. and 1 lower buffer fail. I've also had the y buffer fry it's top chip, blow a capacitor and FET on the y-main, and fry the top transformer on the power supply before my eyes. It only took 5 seconds. Replacement of the 3 y boards will almost always fix the sound but no picture problem. Hope this helps!

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4 Answers

SAMSUNG TV WONT TURN ON JUST CLICKS


I just fixed this very same problem. The capacitors are the problem. However, I think that if you have some minimal skills with soldering, you can fix this yourself. You just need to take out the system board, then the power supply parts are on the top right. The bad capacitor(s) will be bulging at the top and possibly have some brown stuff coming out. The ones that go bad are 1000microfarad, 10V, however you can replace them with higher voltage. I got 35V caps from radio shack for 1.59 each. You just need to solder out the bad ones and then put the new ones in and solder. Remember that the negative end goes on the side with the bold black part of the circle on the system board. Then just cut off the extra ends of the capacitors. If you are capable of doing this yourself, you will spend at most 6 dollars instead of however much a technician costs.

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3 Answers

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It's a pretty common problem. The no picture but sound problem is usually the y sustain board. I've replaced 2 on mine now. The 680uf 35V capacitors usually are bulging because one of the power transistors went and took them out. This has happened to both of the y boards I had. One time the failing y board took out the buffer boards too, and once it did not. The fix is super simple and anyone with even the most rudimentary knowledge of computers or electronics can do the labor yourself. You should do the simple stuff first by just doing a quick test with a multimeter. Just check the power coming to the y board. After that you can just remove the y board by removing 3 cables and like 3 screws. Plug in the new board and it's done! You can source the parts from a place like shopjimmy or discount merchant. 3 boards were like 200 bucks. 1 board is like 100 bucks. Labor took me 15min. Think about that the next time an electronics repair place charges you 1000 dollars. Of course they check everything (Yeah right) and warranty their work (I don't) but if you check the service manual it states that this is the most common repair. Look for the Canadian manual online. Hope this helps!

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