Samsung UN32EH4003FXZA LED TV No Backlights How to Test Voltages for Power Supply and LEDs

No Backlights How to Test Voltages for Power Supply and LEDs
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[@jasonphilander2734]

Hi Jimmy. What should the DC output to the LED's be on our power supply? (Part number: BN44-00666D)

[@shabibalbalushi6183]

well explained and thanks for sharing it with us.

[@alolouh6785]

thanks for all. I need help with my lg plasma tv 42PQ2000

[@bradmckinney7603]

Thanks for the video; very well done. I have this exact TV with the same number on the power supply board. The voltages on the board are good with the Conn. Disconnected, and read about 108 volts with all of the LED's on when connected. When I operate the remote it seems to be entering the commands as the red LED on the front panel blinks with each entry, but the screen just shows a dark blue glow. I swapped the main board from this TV in to a working UN32EH4003F (no XZA) as they were the same and it worked, so I know the main board is okay. I also swapped the ribbon cable from the good TV into the bad one with no change. The power supply boards were quite different even though the connectors we're the same. I put the power supply from the good TV into the bad one and the TV turned on, but the screen was black, and the LED's did not light up. I was afraid that I might end up with two broken TV'S if I put the power supply from the bad TV into the good one, so I didn't. I don't know the number of the power supply board in the working TV, nor did I check the voltages as I found your video after putting it back together. Do you think my power supply is bad, or could it be the long thin board attached to the main board and the screen via ribbon cables? It's the only other thing left. Thank you for your time and attention.

[@36USMC]

Same problem. You fix it?

[@bradmckinney7603]

@@36USMC No' i ended up replacing both the power supply and the main board and neither one fixed it. I suspect that the small circuit board attached to the screen with ribbon cables was bad. it was the only thing left, but the ribbon cables were soldered on so I decided I had spent enough time and money on it already, and trashed it all.

[@baltukur3368]

I have a Samsung tested strip backlight lights up split strip + -+ - when tested with led tester both stripes light up 93v top 63v on bottom using external led tester however when connected to psu backlight don't come on and voltage is 236v on + -+ is 0v -0v I suspect it's something on PSU board in feedback circuit

[@Ibelieve218]

ok question i have a 50 inch sharp roku tv no voltage table on the led but when measured led 1 and led 2 measure 68.5 volts.I have no idea if thats normal? the power board is pltvfy721xxd1 both led strips do not light ..

[@aleksandardzoroski7769]

I have tv backlight problem i know that the leds are bad but with the leds in and out its mesuring the same On startup mesures around 80 volts and goes down and settles at 45 volts i dont know if that is good or bad

[@sabotage3d]

Hi, I am getting these readings my TV is this model: UE32EH5000KXXU VER:07 Is it the PSU or the back-lights? --- Plugged led lights cable --- 1. D+ and 5. D- = 162.8v 2. 5- and 4. 5+ = 00.0v --- Unplugged led lights cable --- 1. D+ = 166.5v 2. 5- = 00.0v 3. N. C 4. 5+ = 00.0v 5. D = 01.8v

[@pompin1366]

thanks for the video,do you know , where can I Find the schematic diagram for the same model ??

[@naiefelyemeni1986]

hi i tried this on a tcl 65 smart tv 2018 model. I get couple volts only? tv is on , does this mean board is bad ? the other boards are getting 5-20v ethernet port light is on. I cqn see a very faint picture no backlight at all. I hear sound to.

[@sal8349]

If number 1 test points gets voltage but number 2 test point gets 0 volts with the led cable disconnected what does that mean.

[@davidturner2004]

SAMSUNG UN65MU6290VXZA Have sound but screen is black no visible back lights flashlight test showed video on screen. Replace LED/Power board no change I believe I now need to check LED strips. Any tips (do I have to replace LEDs and board at same time ?)

[@parttimehelper8804]

Is there a way to test the light strips when they are Off of the TV? Can a different power source be connected to them?

[@manuel3655]

what about if one port is 160v and the other read 0 this with the led connected and led disconnected that's means the power supply right ??thank you

[@mattwhite7014]

I'm having the EXACT same problem! One pin is showing 160v while the other two are showing 0v. What did you finally decide to do?

[@andrew6139]

ON MY POWER SUPPLY UNDER IT IT HAS NON CONDUCTIVE PAPER THAT HAS PLASTIC RIVET HOLDING IT UNDER THE CIRCUIT BOARD IS THERE ANY SPECIAL WAY TO REMOVE THE PLASTIC RIVETS OR HAVE SEEN THEM THANK YOU

[@randypotter9170]

Hi Jimmy I have a Samsung 40 inch TV model numberLN40E550F7F. It has no picture but sound. It has no backlight. When turning on the TV it passes the flashlight test and has a picture. I removed the back cover and checked the power board for visual defects and could not see any. I checked for voltages similar to the way you checked them in the above video. My voltage when the tv is on is 0 to the LED's. When powering on the TV there is a faint click and the LED's turn on for a split second and a voltage spike up to 49 volts and then down again to 0.With the plug for the LED's disconnected from the power supply there is 0 voltage when on and 0 voltage when turning the TV on. With the info you have supplied in all your videos i am presuming it is a power supply problem. With the info i have provided could you confirm my findings.

[@meghashreem.l5330]

I have samsung led TV model numberUa32f5500ARLXl.i have done flashlight test and have seen the circuits all looks fine.but i feel issue is with backlight. Can you please help me which led tester should be taken to test the backlight. Details : ac100-240v 50/60hz 86w,model ua32f5500

[@abdulazizalali2114]

hi I would like to have some help on fixing my samsung LED TV (type No : UA40EH5000R) where it shows a gray vertical band at the left of the screen

[@saboorsaboor704]

I have a 46 inch samsung led tv. When I disconnect the led connector and measure the voltage on the power supply board I get 220 volt on two pins. Is it too high? Because you were getting close to 190 volt.

[@billkane9255]

I have a Samsung LED UN46EH5000FXZA with a black screen (no backlights, flashlight shows menus). I have now replaced the power supply board (BN44-00667a) and the main board (BN96-28925a) with new parts from your site and got no change in performance. What's the next steps? Thanks

[@Ellidertroll14]

It's a LED failure nom doubt about it. For sure !!

[@mirriammusoni181]

I have a samsung UA32D4003 Standby light just blinking, what cound be the problem?

[@te71se]

I have a UN32EH4003F with DF320AGH-R1 panel and BN44-0664A that has LED connector labelled 1: D+ 2: S- 3: NC 4: S+ 5: D-. If I check for voltage over D1 & D- pins I get 170V, but I get 0V over S- & S+ pins. Same result if I have the backlight plugged in or not. Does this indicate faulty power supply?

[@TheAyerswv]

What did you find out? I am getting the same readings?

[@pearlarasbord]

@@TheAyerswv same on my side, any news?

[@krzyhoo2]

I have same labels and I found pins 2, 3 and 4 are connected together and goes nowhere (unless this is multilayer board, but I doubt it), so in our TV's LEDs gets the power only from the pins 1 and 5, so if you have high voltages plugged and unplugged it is rather LEDs problem

[@te71se]

@@krzyhoo2 indeed - I took a stab in the dark and ordered up LED's and that fixed it. Not bad for a TV saved from the dumpster that cost $20 to fix.

[@eliseolujan]

I am about to take my 75 inch Samsung TV to a repair shop to have this type of job done. It sucks I know I can probably fix it myself but the truth is I don’t want to break it in the process. How much $$ am I looking at to have this type of diagnosis and fix done? Any dancers appreciated.

[@mattwhite7014]

1) What is considered "normal voltage"? 2) I have three (positive) test points. Only one of them gives a reading of 160v. The other two are showing 0v. Is that an indication of a bad power supply board? (LED connector is unplugged.)

[@pearlarasbord]

Hello did you find the conclusion? I have the same problem!

[@TysonTc]

whoa my back lights light up when I bridge 1 and 2 but on my board it claims 1 is positive and 2 is negative dcv of 115.0

[@TysonTc]

when I bridge them voltage drops to 115.0 dcv than they light up can I just bridge these without to much problems

[@jrose92081]

I can do the same thins by bridging 1 and 2 together. Did you end up doing a permanent bridge?

[@TysonTc]

Jess Rose yea i did it is working fine, I unplug the tv set when not in use just to be safe.

[@cpt2fantastic]

OMG this just worked for me too! I've permanently bridged pins 1 and 2 on the connector itself, and my LED's are working!! Thank you so much for your comment here! You just saved me buying a new TV :-D

[@jesse19skelton]

Thanks for sharing. This fixed my tv as well. I love the internet.

[@JoginderSingh-sr3fz]

Sir, my lg 42 inch led has no picture, blank n black screen, vertical lines with flashlight test. Kindly advise. Thanks

[@ashrafkarjiker6888]

How do you know the voltage values

[@sohailanwer1972]

Samsung 40 backlight and main power supply board

[@commentcomment36]

HELLO SIR please help me i get 185v with cable connected and 185 with cable disconnected psu or led panel ? please help me my samsung is UE40EH6030 thank you sir

[@narenburse7906]

After some time back light in off possion of Samsung LA40c530 F1RfxL . Please send me How to repair this problem?

[@lazaromorales5371]

I tested both sides, on the power supply board but i only get a reading on one point

[@muhammadfikrun6940]

hallo mr, can i now how to open the back case?

[@steveferguson882]

purchased an item for 57.59 then realized i needed to return the still unused item and was only given 30.04 they kept almost half of the purchase price for doing nothing so be aware if you need to return anything

[@CTCTraining1]

Yes, there is often a restocking fee to accept back and re-test returned items before they can be put back on sale .. spotting damage and swapped items can be tricky. I guess some of the big sellers with lots of equipment and free staff time might be able to absorb this cost but would be an issue for smaller sellers without tamper-evident packaging.

[@TysonTc]

so I preformed this test my results pin 1+ and p2- I get 153.0 dcv on p4- and p5+ 00.0dcv

[@pearlarasbord]

Hello, I had the same, it was an issue because of the led or the power supply?

[@manuel3655]

what if only one port got voltage but the other no but the power supply is new ??

[@danielgarrido3192]

This video is not acording with this model tv

[@ranasarfraz7599]

sir my led TV ktc led voltage prablum

[@artjesticpharaoh9802]

I have a bad power board. Yay

[@ranasarfraz7599]

6pin Jack

[@fathulcl2976]

I measure no value 6 pinout.. what the problem?

[@readyxxi]

Samsung sucks