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LCD TV Reliability #4731078
04/18/18 02:43 PM
04/18/18 02:43 PM
Joined: Feb 2010
Posts: 4,838
Central Texas
sleddriver Offline OP
sleddriver  Offline OP
Joined: Feb 2010
Posts: 4,838
Central Texas
Neighbor gave me a 2015 Samsung 48" LCD panel with LED backlights, that has seen little use. First time to investigate one. It's stuck in a repeated screen flash loop where the PS attempts to start, detects a fault, shuts down, tries again, detects the same fault, shuts down...ad infinitum.

The MB & T-CON boards are OK. There may be a fault in the LED drivers and/or a few LED's themselves. I'll have to do a current draw check to see what's going on. I suspect there's a short on the LED strips somewhere.

If you have a set with a LED backlight, you can extend it's life by turning down the backlight level (if possible) or setting it where it's not at 100% BRIGHT all the time. LEDs need to be driven within limits to ensure long life. I suspect many are being over-driven either through design or by their users. Once the LED cktry is Tango Uniform (black screen) many junk the set due to the high cost of repair. Some (many?) are only a few years old like this one. That must BITE! Neighbor paid $400 + $33 in tax. Went black a few months ago. So they bought another one. May even be worth paying for an extended warranty on these, depending on the length of the OEM coverage.

Lastly, I'm interesting in hearing your reliability experience with your LED-backlight sets. How long they lasted. How long before they would no longer start, one side became dark, they flashed like mine, buzzed/arced. CCF backlight is a much different technology so let's leave that out. Same with plasma and OLED.

I'll post updates here as I dig further into this one.


1998 Volvo V70 T5 228,880 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson
Re: LCD TV Reliability [Re: sleddriver] #4731084
04/18/18 02:46 PM
04/18/18 02:46 PM
Joined: Apr 2017
Posts: 414
Mississippi
Speak2Mountain Offline
Speak2Mountain  Offline
Joined: Apr 2017
Posts: 414
Mississippi
We have a year.5 on our Sammy and background light all the way up. My only complaint is the HDR sucks on so many Sammy TV's

Re: LCD TV Reliability [Re: sleddriver] #4731101
04/18/18 02:54 PM
04/18/18 02:54 PM
Joined: Oct 2002
Posts: 36,418
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline
Joined: Oct 2002
Posts: 36,418
Great Lakes
Originally Posted By: sleddriver
If you have a set with a LED backlight, you can extend it's life by turning down the backlight level (if possible) or setting it where it's not at 100% BRIGHT all the time.

Our LED backlit Samsung is about 9 years old now. First thing I did was dimmed its LED backlight because it's not very uniform and results in patches of "white clouds" visible in very dark scenes, especially when watching TV at night.


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
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Re: LCD TV Reliability [Re: sleddriver] #4731130
04/18/18 03:11 PM
04/18/18 03:11 PM
Joined: Apr 2017
Posts: 441
Utah, USA
28oz Offline
28oz  Offline
Joined: Apr 2017
Posts: 441
Utah, USA
I've got a cheapo Dynex (not LED though) that I picked up at Best Buy at least 10 years ago. Works flawlessly still. Main TV in the living room is demo/floor Vizio unit that is at least 5 years now. Both work great. Speakers still sound good (not buzzing or anything) and zero dead pixels or uneven lighting on either of them.


-----------------
1990 Nissan 300zx - Castrol Edge Euro 0W-40
2004 Nissan Quest - Pennzoil Platinum Euro 0W-40
2003 Ford Excursion 7.3 PSD - Mobil 1 TDT 5w-40
Re: LCD TV Reliability [Re: sleddriver] #4731136
04/18/18 03:18 PM
04/18/18 03:18 PM
Joined: Jul 2015
Posts: 508
Southern Indiana
Mantooth Offline
Mantooth  Offline
Joined: Jul 2015
Posts: 508
Southern Indiana
My Samsung is from 2009 ($1,450 new), she lights up and looks just fine. It is our main TV that sees heavy usage in our living room. Quality and reliability wise, I have no complaints.

About 5 years ago we had a surge make it into our house which fried a portion of the PS board. My wife started shopping for a replacement TV, and I started shopping for a new board. Long story short; I found an acceptable replacement on eBay which I ordered. It shipped from China so I had to wait a couple of weeks. Board arrived, I installed it, and she has run like a champ since then. If you locate your problem and can repair it cheap, I say fix it and enjoy your low-cost TV for as long as possible.


'14 Durango AWD 3.6,(mine) Hav ProDS 5w30/Napa Gold
'15 Journey AWD 3.6, (wife's) Napa Syn 5w20/Napa Gold
'01 F250 4x4 7.3PSD, 126k, M1 TDT 5w40/MC

Re: LCD TV Reliability [Re: sleddriver] #4731170
04/18/18 03:48 PM
04/18/18 03:48 PM
Joined: Aug 2011
Posts: 2,046
Lakeside, CA
Blkstanger Offline
Blkstanger  Offline
Joined: Aug 2011
Posts: 2,046
Lakeside, CA
We have a Samsung Backlit LED that is 3 years old. It stays on about 20 hrs a day. No problems at all with it. Now when I get home I will have to check the settings.


99 Jeep WJ 4.7 190,000 Maxlife 10w30, Fram Ultra.
Re: LCD TV Reliability [Re: sleddriver] #4731198
04/18/18 04:25 PM
04/18/18 04:25 PM
Joined: Aug 2017
Posts: 594
MN
14Accent Offline
14Accent  Offline
Joined: Aug 2017
Posts: 594
MN
4 years on my Vizio 60", no issues. Backlight set at 100% for most viewing, 85% for dark viewing of movies. Local dimming turned on, of course.


2013 Chevrolet Volt - Saves enough in fuel to pay for itself!

2003 Cadillac Seville STS - The winter "beater", it uses the Volt's fuel
Re: LCD TV Reliability [Re: sleddriver] #4731218
04/18/18 04:43 PM
04/18/18 04:43 PM
Joined: Dec 2016
Posts: 2,177
VA
maverickfhs Offline
maverickfhs  Offline
Joined: Dec 2016
Posts: 2,177
VA
Originally Posted By: sleddriver
Neighbor gave me a 2015 Samsung 48" LCD panel with LED backlights, that has seen little use. First time to investigate one. It's stuck in a repeated screen flash loop where the PS attempts to start, detects a fault, shuts down, tries again, detects the same fault, shuts down...ad infinitum.

The MB & T-CON boards are OK. There may be a fault in the LED drivers and/or a few LED's themselves. I'll have to do a current draw check to see what's going on. I suspect there's a short on the LED strips somewhere.

If you have a set with a LED backlight, you can extend it's life by turning down the backlight level (if possible) or setting it where it's not at 100% BRIGHT all the time. LEDs need to be driven within limits to ensure long life. I suspect many are being over-driven either through design or by their users. Once the LED cktry is Tango Uniform (black screen) many junk the set due to the high cost of repair. Some (many?) are only a few years old like this one. That must BITE! Neighbor paid $400 + $33 in tax. Went black a few months ago. So they bought another one. May even be worth paying for an extended warranty on these, depending on the length of the OEM coverage.

Lastly, I'm interesting in hearing your reliability experience with your LED-backlight sets. How long they lasted. How long before they would no longer start, one side became dark, they flashed like mine, buzzed/arced. CCF backlight is a much different technology so let's leave that out. Same with plasma and OLED.

I'll post updates here as I dig further into this one.

Mind asking, what's the model number number? I fixed a similar one a few months ago and had some LEDs which were burnt. Simple, but little bit tedious fix.


2006 Civic EX 202K/AT
2006 Acura TSX 180K/AT
Re: LCD TV Reliability [Re: maverickfhs] #4731258
04/18/18 05:36 PM
04/18/18 05:36 PM
Joined: Feb 2010
Posts: 4,838
Central Texas
sleddriver Offline OP
sleddriver  Offline OP
Joined: Feb 2010
Posts: 4,838
Central Texas
UN48J5000


1998 Volvo V70 T5 228,880 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson
Re: LCD TV Reliability [Re: sleddriver] #4731312
04/18/18 06:48 PM
04/18/18 06:48 PM
Joined: Jun 2015
Posts: 679
Arizona
Kawiguy454 Offline
Kawiguy454  Offline
Joined: Jun 2015
Posts: 679
Arizona
If you hear sound or otherwise know the TV is working but you cannot see it. I would look very closely at the back-lighting and PS components. Look for bad or broken solder joints (Dull) and areas that look like there has been any heat discoloration. I believe the LED arrays are in blocks, try to disable them one at a time and find a bad one.

A good electrically engineered back-light system will have the led arrays biased correctly to produce the amount of lighting needed with safety margins at full brightness. Theoretically they will not last any longer by running them dim. Yes if one of the LED's shorted it could cause the PS to repeatedly try to reset. I have never had to repair a modern TV cause they are so highly integrated the replacement parts for a 4 yr old TV would cost more than a completely new set. most people just chuck em when they go wonky.

I had a vizio 30" a few yrs back that was 4 at the time one of the main power supply connections to the BL was weakened from repeated heat cycles and the solder had gone to a dull appearance. I re soldered and slightly re engineered for better ventilation and it worked fine again till i gave it away.

Last edited by Kawiguy454; 04/18/18 06:53 PM.
Re: LCD TV Reliability [Re: sleddriver] #4731504
04/18/18 09:52 PM
04/18/18 09:52 PM
Joined: Apr 2017
Posts: 1,141
SF BAY AREA, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 1,141
SF BAY AREA, CA
Can't go wrong with Samsung or LG.


2010 Ford Escape FWD 2.5 ~90K Miles
Currently: Royal Purple 5W-30, Wix 51348
I prefer Royal Purple, Valvoline, Castrol, and O'Reilly oils.
Re: LCD TV Reliability [Re: sleddriver] #4731519
04/18/18 10:17 PM
04/18/18 10:17 PM
Joined: Nov 2008
Posts: 9,107
Phoenix
dishdude Offline
dishdude  Offline
Joined: Nov 2008
Posts: 9,107
Phoenix
LCD TVs are super reliable, I buy Vizio and have yet to have one fail.


2018 Challenger SRT
Re: LCD TV Reliability [Re: sleddriver] #4731524
04/18/18 10:29 PM
04/18/18 10:29 PM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
Common thing that I have noticed on many Samsungs. I would just buy an IPS monitor, connect it with HDMI and good logitech speakers and be done.


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: LCD TV Reliability [Re: sleddriver] #4731575
04/19/18 12:40 AM
04/19/18 12:40 AM
Joined: Feb 2010
Posts: 4,838
Central Texas
sleddriver Offline OP
sleddriver  Offline OP
Joined: Feb 2010
Posts: 4,838
Central Texas
Bingo:

Well that explains the buzzing, crackling and smell of heat & ozone!
Even LCD backlight sets can arc if given the opportunity!


1998 Volvo V70 T5 228,880 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson
Re: LCD TV Reliability [Re: dogememe] #4731636
04/19/18 05:11 AM
04/19/18 05:11 AM
Joined: Jan 2011
Posts: 2,748
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,748
N.Ohio
Originally Posted By: dogememe
Can't go wrong with Samsung or LG.

Agree.


The "thinking" man's friend.
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