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Samsung LCD TV with no video and high pitched sound

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  • Digital TV
  • TV
  • LCD
  • Samsung
  • Home Theatre
Last response: in Home Theatre
January 7, 2010 11:18:39 AM

Hi,

I have a Samsung LN40A550 LCD TV which I have had for just over a year. Warranty is one year LOL. Well heres my problem. I was watching TV yesterday and all of a sudden the picture went all crazy, it was multiple colours with vertical or horizontal lines and the sound went to a loud high pitched noise. After about 30 seconds the picture and sound went back to normal. I used my TV without any problems 3 or 4 times since then, but when I go to turn it on this morning the TV powers on correctly and has the power on sound, but immediately after that their is no video and a high pitched sound. I tried disconnecting all devices from the TV, tried alternative power source. The TV is normally connected to a surge protector.

Any leads as to what may be wrong? I have scoured google for any similar problems but came up with only one similar instance saying its a blown capacitor.

Thanks,

Morgan


EDIT: I was not very clear on the audio. It is LOUD and high pitched almost sounds like its screaming lol

More about : samsung lcd video high pitched sound

October 20, 2011 3:12:12 AM

morganj said:
Hi,

I have a Samsung LN40A550 LCD TV which I have had for just over a year. Warranty is one year LOL. Well heres my problem. I was watching TV yesterday and all of a sudden the picture went all crazy, it was multiple colours with vertical or horizontal lines and the sound went to a loud high pitched noise. After about 30 seconds the picture and sound went back to normal. I used my TV without any problems 3 or 4 times since then, but when I go to turn it on this morning the TV powers on correctly and has the power on sound, but immediately after that their is no video and a high pitched sound. I tried disconnecting all devices from the TV, tried alternative power source. The TV is normally connected to a surge protector.

Any leads as to what may be wrong? I have scoured google for any similar problems but came up with only one similar instance saying its a blown capacitor.

Thanks,

Morgan


Hi morgan - I have just experienced the same thing that you described happend to your samsung LN40A550. Our is the same model and has started making a very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen. Can't even leave it plugged in because of the high pitched noise for too long. Wondering if you ever found out what was wrong with your LCD and if this high pitched noise was due to bad capicator. We have a repairman coming to look at our tv this monday that Samsung has set up the appointment but if this problem is not connected with bad capacitors we are responsible for the bill. Was hoping to get any information I can before they arrive. Any info would be so appreciated. Thank you so much. Not very technically literate!! Ellen

EDIT: I was not very clear on the audio. It is LOUD and high pitched almost sounds like its screaming lol

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October 20, 2011 2:29:45 PM

I was getting the green vertical lines too before the problem became too serious. The problem was intermittent too for some time and just unplugging it and plugging it back in would get the TV to load up properly.

I managed to fix this problem myself although I have no idea what fixed it. I did a firmware upgrade when I was able to get the TV to load up on the TV and it seemed to work for awhile. The problem then returned a few weeks later. I took apart the TV disconnected all the connections on the boards and could not find any problem with the capacitors. I put it all back together, confused and worried my TV was a giant paperweight. I plugged it back in and still had the problem. I left it unplugged for about 2 weeks then I plugged it back in just to see if I could get it to work and the TV turned on no problem. It has been working since then without any hiccups. This TV has seen some heavy use since then.
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October 21, 2011 1:26:00 AM

Thanks for the reply. Just wondering if you were you getting a high pitched buzzing sound that is so loud you have to turn it off immediately? We had vertical green lines and now we have nothing but a a black screen with a very very loud high pitched almost alarm/buzzing sound. The t.v. takes a few minutes to acutally turn on and then when it does, the screen is still black and we immediately get that extremely loud high pitched buzzing sound. You have to turn it off immediately, its so oud. I'll try and do exactly what you have done too. Would love to get some heavy use from our t.v. Its not even 3 years old yet, but just curious if you experienced the black screen and noise too. Hoping it will be fixable. Thanks for the info and reply again. Ellen
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October 21, 2011 11:06:14 PM

symptoms are similar but not the same. Mine wouldn't take a few minutes to turn on. It would just start doing the high pitched very loud noise about 3 seconds after turning the power on. It would make the usual samsung power on sound then immediately start screeching loud with nothing on the screen. Other than that, your symptoms sound similar. I have read a lot on bad capacitors and the TV taking a long time to turn on is usually a sign of bad capacitors.
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December 8, 2012 8:28:25 PM

Any resolution on this? I just had the caps replaced and still get this. They said possibly tcon?
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December 9, 2012 3:01:20 AM

My TV is still working. Haven't had any problems since those problems almost 2 years ago now. I guess letting the capacitors drain for those few weeks and reseating all the connections fixed it for me. I did not replace any capacitors in my TV, just took the boards apart and all connections apart and put it back together. I also removed and remounted the boards.
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December 28, 2012 2:22:49 AM

Samsung replaced my caps 2 weeks ago. i then got the symptoms described in this forum again (green lines, can see picture behind, loud screeching, 2-5 times to power cycle before acting normal and then working fine for hours). i got a t-con board on shopjimmy.com for $34 and got the symptoms again. hopefully it's not the lcd panel itself. i guess the only things left are the main board or inverter board. pndering on switching out inverter board.
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February 17, 2013 4:51:16 PM

jemp75 said:
Samsung replaced my caps 2 weeks ago. i then got the symptoms described in this forum again (green lines, can see picture behind, loud screeching, 2-5 times to power cycle before acting normal and then working fine for hours). i got a t-con board on shopjimmy.com for $34 and got the symptoms again. hopefully it's not the lcd panel itself. i guess the only things left are the main board or inverter board. pndering on switching out inverter board.


Did you ever find out whether it was the inverter or the main board? I have the same issue and and wondering which to purchase. Thanks
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February 19, 2013 1:18:07 AM

BranK said:
Did you ever find out whether it was the inverter or the main board? I have the same issue and and wondering which to purchase. Thanks


i suspect the main board, but have not gone any further. really, when we want to watch tv, we turn on the tv about 5 minutes prior and then when we come back, it's fine (after a few power cycles and colorful screens, but not the screeching so often). also, make sure no inputs are active - they (apple tv or xfinity hd box) seem to raise the probability of the screeching if they are on and the tv is 'warming up.' nobody has main boards in stock for less than $200 up front (minus $50 for core deposit when you return the old board) for my version.
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March 13, 2013 6:04:16 AM

jemp75 said:
BranK said:
Did you ever find out whether it was the inverter or the main board? I have the same issue and and wondering which to purchase. Thanks


i suspect the main board, but have not gone any further. really, when we want to watch tv, we turn on the tv about 5 minutes prior and then when we come back, it's fine (after a few power cycles and colorful screens, but not the screeching so often). also, make sure no inputs are active - they (apple tv or xfinity hd box) seem to raise the probability of the screeching if they are on and the tv is 'warming up.' nobody has main boards in stock for less than $200 up front (minus $50 for core deposit when you return the old board) for my version.


I am having the same problem... It mostly does it when the HDMI from the Ps3 is on.. I can turn the TV on for 10 minutes let warm up then turn on the PS3 and most of the time its fine..

I would like to fix it though... Has anyone found out if its the mainboard?
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March 13, 2013 6:04:17 AM

duplicate
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March 13, 2013 6:31:15 AM

tpeter said:
jemp75 said:
BranK said:
Did you ever find out whether it was the inverter or the main board? I have the same issue and and wondering which to purchase. Thanks


i suspect the main board, but have not gone any further. really, when we want to watch tv, we turn on the tv about 5 minutes prior and then when we come back, it's fine (after a few power cycles and colorful screens, but not the screeching so often). also, make sure no inputs are active - they (apple tv or xfinity hd box) seem to raise the probability of the screeching if they are on and the tv is 'warming up.' nobody has main boards in stock for less than $200 up front (minus $50 for core deposit when you return the old board) for my version.


I am having the same problem... It mostly does it when the HDMI from the Ps3 is on.. I can turn the TV on for 10 minutes let warm up then turn on the PS3 and most of the time its fine..

I would like to fix it though... Has anyone found out if its the mainboard?


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March 13, 2013 6:35:44 AM

MAIN BOARD! it works, just not getting the full 16:9 screen, which i am now trouble shooting. it is nice to not have to wait. got it on shopjimmy.com for $89 which was about a 2 month wait. make sure you buy the board for your version (mine was SQ01) hence the long wait for the only replacement specified.
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April 25, 2014 3:36:18 PM

It's a main board issue and a repair service is available on ebay if you search the main board part # off the white sticker (BN94-XXXXXX)
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December 1, 2014 6:28:13 PM

sonny10 said:
morganj said:
Hi,

I have a Samsung LN40A550 LCD TV which I have had for just over a year. Warranty is one year LOL. Well heres my problem. I was watching TV yesterday and all of a sudden the picture went all crazy, it was multiple colours with vertical or horizontal lines and the sound went to a loud high pitched noise. After about 30 seconds the picture and sound went back to normal. I used my TV without any problems 3 or 4 times since then, but when I go to turn it on this morning the TV powers on correctly and has the power on sound, but immediately after that their is no video and a high pitched sound. I tried disconnecting all devices from the TV, tried alternative power source. The TV is normally connected to a surge protector.

Any leads as to what may be wrong? I have scoured google for any similar problems but came up with only one similar instance saying its a blown capacitor.

Thanks,

Morgan


Hi morgan - I have just experienced the same thing that you described happend to your samsung LN40A550. Our is the same model and has started making a very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen. Can't even leave it plugged in because of the high pitched noise for too long. Wondering if you ever found out what was wrong with your LCD and if this high pitched noise was due to bad capicator. We have a repairman coming to look at our tv this monday that Samsung has set up the appointment but if this problem is not connected with bad capacitors we are responsible for the bill. Was hoping to get any information I can before they arrive. Any info would be so appreciated. Thank you so much. Not very technically literate!! Ellen

EDIT: I was not very clear on the audio. It is LOUD and high pitched almost sounds like its screaming lol



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December 1, 2014 6:34:11 PM

I don't have an answer however the screeching noise was coming from the TV so I thought but my TV was replaced this morning. Greay screen, installed new TV and noise started again however didn't blow up the TV. My Son says it's coming from the surge protector and not the TV. I'm going to replace the power strip and hope for the best. After buying a new TV (Vizio) to replace same that was 7 years old I hope to solve the issue and I'm convinced it was the power strip, good $60 Belkin protector>?????
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December 1, 2014 6:39:43 PM

Repair service on Ebay should fix your issue:

http://www.ebay.com/itm/Samsung-LN46A550P3FXZA-REPAIR-S...

relish said:
sonny10 said:
morganj said:
Hi,

I have a Samsung LN40A550 LCD TV which I have had for just over a year. Warranty is one year LOL. Well heres my problem. I was watching TV yesterday and all of a sudden the picture went all crazy, it was multiple colours with vertical or horizontal lines and the sound went to a loud high pitched noise. After about 30 seconds the picture and sound went back to normal. I used my TV without any problems 3 or 4 times since then, but when I go to turn it on this morning the TV powers on correctly and has the power on sound, but immediately after that their is no video and a high pitched sound. I tried disconnecting all devices from the TV, tried alternative power source. The TV is normally connected to a surge protector.

Any leads as to what may be wrong? I have scoured google for any similar problems but came up with only one similar instance saying its a blown capacitor.

Thanks,

Morgan


Hi morgan - I have just experienced the same thing that you described happend to your samsung LN40A550. Our is the same model and has started making a very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen. Can't even leave it plugged in because of the high pitched noise for too long. Wondering if you ever found out what was wrong with your LCD and if this high pitched noise was due to bad capicator. We have a repairman coming to look at our tv this monday that Samsung has set up the appointment but if this problem is not connected with bad capacitors we are responsible for the bill. Was hoping to get any information I can before they arrive. Any info would be so appreciated. Thank you so much. Not very technically literate!! Ellen

EDIT: I was not very clear on the audio. It is LOUD and high pitched almost sounds like its screaming lol





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December 2, 2014 3:15:36 PM

So here's a question.

I have an LN40A550 with the described issue - and is getting worse daily.

Here's where I get stumped. Directv connected via HDMI causes this issue. Turn in BluRay player via HDMI port - and no issue at all.

I can swap the HDMI cables from port to port without issues and get the same results.

Still think it's the TCON board? The TV is from 2008, so I am okay replacing it with something newer if I really have to.

kevinm34232 said:
Repair service on Ebay should fix your issue:

http://www.ebay.com/itm/Samsung-LN46A550P3FXZA-REPAIR-S...

relish said:
sonny10 said:
morganj said:
Hi,

I have a Samsung LN40A550 LCD TV which I have had for just over a year. Warranty is one year LOL. Well heres my problem. I was watching TV yesterday and all of a sudden the picture went all crazy, it was multiple colours with vertical or horizontal lines and the sound went to a loud high pitched noise. After about 30 seconds the picture and sound went back to normal. I used my TV without any problems 3 or 4 times since then, but when I go to turn it on this morning the TV powers on correctly and has the power on sound, but immediately after that their is no video and a high pitched sound. I tried disconnecting all devices from the TV, tried alternative power source. The TV is normally connected to a surge protector.

Any leads as to what may be wrong? I have scoured google for any similar problems but came up with only one similar instance saying its a blown capacitor.

Thanks,

Morgan


Hi morgan - I have just experienced the same thing that you described happend to your samsung LN40A550. Our is the same model and has started making a very high pitched buzzing sound with no picuture coming on. We did have a bunch of green vertical lines, but now just a black screen. Can't even leave it plugged in because of the high pitched noise for too long. Wondering if you ever found out what was wrong with your LCD and if this high pitched noise was due to bad capicator. We have a repairman coming to look at our tv this monday that Samsung has set up the appointment but if this problem is not connected with bad capacitors we are responsible for the bill. Was hoping to get any information I can before they arrive. Any info would be so appreciated. Thank you so much. Not very technically literate!! Ellen

EDIT: I was not very clear on the audio. It is LOUD and high pitched almost sounds like its screaming lol







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February 12, 2015 6:52:06 PM

Been dealing with this for awhile now. Started with turning on with noises, taking maybe 1-2 self restarts to gain regular picture(about 2-3 mins). Now it can take up to 40 mins to turn on...Really getting sick and tired of it. However, it only happens with HDMI inputs because when I play my original xbox under component 1 there is not an issue.
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September 15, 2015 3:35:24 PM

SOLVED - needed a new motherboard, not a new TV.

I, too, experienced fuzzy lines and a loud screech whenever I turned on my 5 year old Samsung TV (37" LED 550 series). After a few seconds, the noise would go away and the TV would look normal. Over the course of a month or so, it gradually got worse. I didn't really want to buy a new TV, so I investigated fixing it. I called Samsung and asked about the class action suit, but it was settled back in 2012 and no longer active. They then sent me to an authorized repair shop. They said they only handle TVs still under warranty. Another repair shop wanted $150 to take a look plus labor and parts.

After reading many responses and chasing down potential solutions, I finally found a TV repair guy on Craig's List to diagnose the problem for $30. After checking all the cable connections and removing the back of the TV, he said he was 90% certain it was the main board. He also said TVs should last a lot longer than 5 years. He even found a replacement board on eBay for me which I ordered myself for $60 from electroparts_warehouse. It was an exact match to the board's ID# in my TV.

Samsung 37" LN37A550P3FXZA BN94-01723G Main Video Board MotherBoard Unit

He even showed me how to install it myself, but I opted to have him come back and do it for me. VoilĂ ! TV is perfect once again for ~$100. If it had cost more, I might have opted for a new TV, but just researching and comparing them takes time, so it was worth it to me to fix it.
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November 8, 2015 5:21:55 PM

We bought our Samsung 50" in 2008 or 2009, and it worked fine for years. In September 2013 it started doing this screech and lined screen freeze on occasion. Got worse last year, and I figured out it mostly occurred when there was an actual signal coming in. If I leave it on the dormant Roku, it didn't happen when the TV was powered up, As long as I waited 4-5 minutes, I could then use it anywhere. Today it started the screechy thing in the middle of the afternoon, hours after turning it on. Then just happened again, and so I came to search for it. I will look into getting a mother board, as indicated.
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December 26, 2015 4:35:04 AM

I don't have a solution but I'm here to say your not the only one experiencing these problems. When I turn on my xbox half of the times it makes that high pitched sound you described and the screen also goes crazy. I'm glad to hear I'm not the only one with this problem.
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January 3, 2016 8:39:02 AM

I have a LN46A550P3F with the same greenlines/screeching symptoms....

For 10 bucks, I replaced the powerboard capacitors and that did NOT solve the problem. I see here people talking aboiut replacing the main board and there is a kit on line to replace the mainboard as a service (you send a core, they return a good one probably).

Anyway, just adding to the thread stating that replacing your powerboard capaictors does NOT solve this problem.

I am debating about buying themainboard kit vs sending mine out to be repaired. It sounds like the mainboard fix is harder than replacing the capacitors on teh powerboard.
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January 17, 2016 12:37:58 PM

Not an answer, just commiserating. I've had mine for over 10 years... suddenly since two days ago the green lines and scream of death comes out when I turn the TV on. If I just turn it off and back on, it's back to normal. Annoying but I first thought it was just because the TV is so old and on its way out... maybe not if everyone's experiencing this too
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January 27, 2016 11:33:25 AM

I had the same problem and it's the coaxial where the coaxial meets the female part of the television when metal touches the metal it makes the screeching and the pictures lost..so if you just lightly hold it there just so the metal doesn't touch the other metal..so only the pin of the male coaxial lightly/gently goes in or slightly grazes the recieving end on the TV you'll see that you get a picture and no screeching! So my solution is... I took a little bit of poster tack (it looks like blue putty).. Which i rolled a small piece between my fingers into a ball then slightly flattened it and then i put it on the female coaxial port of the TV... So when you go to attach your male coaxial cord (for your cable, VCR or antenna) it will lightly stick in place! So there you have it! And wallah! You have picture with no screeching! **Also... It does require a bit of trial and error to get the right "stick" in the connections "sweet spot" so don't give up if it doesn't stay immediately... It works best if it doesn't get too warm while rolling it between your fingers.
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May 31, 2016 5:22:12 AM

morganj said:
I was getting the green vertical lines too before the problem became too serious. The problem was intermittent too for some time and just unplugging it and plugging it back in would get the TV to load up properly.

I managed to fix this problem myself although I have no idea what fixed it. I did a firmware upgrade when I was able to get the TV to load up on the TV and it seemed to work for awhile. The problem then returned a few weeks later. I took apart the TV disconnected all the connections on the boards and could not find any problem with the capacitors. I put it all back together, confused and worried my TV was a giant paperweight. I plugged it back in and still had the problem. I left it unplugged for about 2 weeks then I plugged it back in just to see if I could get it to work and the TV turned on no problem. It has been working since then without any hiccups. This TV has seen some heavy use since then.


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