I have a 65" UN65JS850DFXZA Samsung TV that will not power on. There is no red standby light. Nothing happens. Any suggestions would be great. It is not the remote. The set has power. I have unplugged the one connect device. I have left the set unplugged for hours. Still nothing.
lainiest if you have guaranteed power to the set it is likely you are having an issue with the power board. You will have to unplug it and remove the back of the set. Then check the power board for any blown fuses or other components. You do want to post pictures of your boards with your question so we can try and assist you further with that. For that use this guide The attached image should show the fuse on your power board. Check for continuity and see if you get power to that, once it is checked. Unplug your set to check it for continuity. Then plug it in and use your meter to check for power.
Comments:
Erm...this is great if you know what the heck you're talking about lol what about advice for us novices?
by Cass Ababio
Cass Ababio but that was for novices :-)) What make and model is your TV? What are the symptoms? What have you checked? What tools do you have available (multimeter etc.) and what are your abilities? I am more than willing to guide you through things step-by-step.
by oldturkey03
This statement about continuity is not accurate. Verifying continuity means that you are checking to make sure there is a complete electrical path/connection between 2 points with minimal resistance. And on these size fuses, you will most likely see resistance around 0.1-0.2 ohms. That is important because you can compare the fuses against each other. If 2 of them give you a resistance around 0.2 ohms and the other shows 40 ohms per say, I would go ahead and call that a bad fuse even though you were able to get some kind of reading through it. You will also need to remove one side of the fuse from the circuit in order to accurately measure the resistance. Other wise you can get a false indication of a “good” fuse.
I have a 32" LED TV name D:Sign Model no "sty1232c red light on but it doesn't turn on screen it is blank
year old 4k Samsung 0693CZH70060F tv power wont turn on what size tool do u need to remove the back plate to access the power board Already plugged it in and unplugged it held down button 1 min to remove any residual power Just like u would a lap top or phone what size socket do you need to remove the back plate. Also if it is the fuse how do you replace it seems to be fused in and not a easy replace based off the Picture.
by Steven
Hi, Was there a storm or blackout between the time when it was working and when it wasn't?
have you tried disconnecting the power cord and pressing the power button on the TV for 30 seconds then reconnecting the power cord turning on the power outlet and then try turning on the TV?
Is the power cord connected directly to an outlet or does it come via a powerboard? How have you proved that the set has power?
Comments:
It worked for me!!! Thank u jayeff!!
by Sarai Koles
I tried the comment about turning off the TV and hold the power button for 30 seconds. I tried that and it didn't work. Then I thought, how can holding the power button do anything, when there is no power. So I tried holding the power button while the TV was on and it worked.
Hi @swanless ,
Holding the power button on when there is no power supplied to the TV allows any "residual" power that is in the TV to dissipate.
By doing this what is hoped will happen is that if there is any corrupted data (caused by a power surge for example) which prevents the firmware from functioning correctly will be deleted (or lost) and the TV will revert back to a default operating condition. Obviously this can't happen if the power is still connected to the TV
You may not believe this but it is usually the first thing most electronics techs (and help centres) do as it can resolve a lot of problems. It is known as a "power refresh" and it can be surprisingly effective in a lot of cases.
by jayeff
Thank you, jayeef! Your solution still works for newer Samsungs, too!
by Chriselle R
This unfortunately did not work for mine. I am at a loss :-(
by AJ Reed
On the power board, there is a relay (its what clicks when you power on). If you tap on the relay (becareful , use the plastic end of a screwdriver), the power should come back on. The relays are crap..
Comments:
Hi, my tv was unplugged for the weekend then when id tried to plug in it wouldn't turn on. My hubby has opened it up and checked there seems to be no problem with the fuse but he says there is no continuity as the treading has worn off or something like that. Problem is he says he needs to solder the board but he has tried using the thick solder wire which isn't taking. I've been waiting a month now missing all my shows for him to sort it out. Is there anyway I can solder it with the thick solder myself? I'm tired of begging him to get proper wire or to fix it for me.
by Melicia H
Melicia H you need to let us know what make and model your TV is. After that tell us where and what your husband wants to solder. How thick is the solder? You soldered before? "no continuity as the treading has worn off " explain this a bit better.
by oldturkey03
Hi. My problem is exactly similar to what is posted above. my Samsung TV went off abruptly and since then the red signal light doesn't come on, I have tried all that is mentioned above, checked the fuse and it was continuous, tried to hold the power button for 30seconds with power cord off and with it on and even tried to gently tap the relay but still no success. Help.
Tv turned itself off after watching it for 20 min. No red light. Tried all those tricks above and nothing worked. Warranty just ended last month. And it’s Good Friday. No chance of getting anyone here for days. Model UA60J6200AW. Help!!!
by Katia
I have a Samsung TV that has a touch screen power button. It worked perfect until we unplugged it to move and now it will not turn on. No red light at the power button. We have two of the exact TV doing this.
by Alccwscdh
Hi @ Vivian Gosselin,
Did you try a power reset, you didn't say?
Here's how:
Switch off the power outlet (if it has an On/Off switch) that the TV is connected to and disconnect the TV power cord from the outlet.
Press and hold the TV’s Power button for 30 seconds to dissipate any residual power from the TV.
Reconnect the power cord to the TV and switch on the power outlet (if it has an On/Off switch)
Try to turn on the TV.
Comments:
because I was wrong…the red light is on. Sorry & Thank you
My new qled lasted 4 hours before clicking and switching off with no red light.
Model is Samsung qe43q60r.
Tried the reset thing but to no avail.
Tried new power cord,same result,changed fuses in plugs,no change,and I've no electronics experience at all.
Have I just wasted £700?
Hi @mmcsc ,
If there is no power light and you have checked the fuse in the plug (was it blown?) and have replaced the cord, as long as you have also checked that the power outlet that the cord was plugged into is still working OK then if the TV is still covered by the manufacturer's warranty then go the warranty route to get it fixed, replaced refunded etc.
As long as there wasn't a power spike just before it failed (storm or power outage) that the manufacturer can claim as the cause and refuse warranty then you should be OK.
If there was, consult your home insurance policy to check if the TV (electrical goods) may be covered for storm and tempest.
Unfortunately it sometimes happens with electronics. They either fail very early on or they work for a long time. Mostly they work for a long time from new.
You can be unlucky. I have a "new" gas oven where it worked when tested upon installation and failed the very next day - faulty electronic control board - the board was replaced under warranty and it has worked for over 3 years now without a hiccup
by jayeff
Hi @nowvoyager
As you have checked the power outlets, then without a red standby power light on the TV there is no option other than to disconnect the power from the TV and remove the back cover and to first check the power board for any problems.
There is a fuse and surge suppressor on the power board located near the power input connector. These would need to be checked first with a Ohmmeter to verify if they're OK or not. Also check for any obvious damage such as heat stressed components or bulging capacitors etc.
If these are OK then power would need to be applied to the TV and the 7.5V standby voltage signal sent from the power board to the mainboard needs to be checked if it is there or not. It is the mainboard that turns on the red standby light when it receives this signal.
If it is not there it is a power board problem. If it is OK then it may be a mainboard or mainboard/power board cable problem. Further testing would be required to determine where and what the problem is.
Be safety aware when working in the back of a TV as there is exposed lethal AC voltage on the power board when the power is connected.
Comments:
my samsung smart tv model code is UA60J6200AKPXD, i have tried power reset and it's still won't turn on, no red light, what should i do? help please
by Vincent Tan
Hi @Vincent Tan
Did you make sure that the power outlet that the TV is connected to is working OK, by plugging in another appliance e.g. a hair dryer to see if it worked or not?
If the power outlet works OK then follow the directions in the answer above your comment.
You will need to have a DMM (digital multimeter) and know how to use it safely when testing near exposed lethal voltage because after you have tested the fuse (Ohmmeter function of DMM) and looked for any obvious damage (bulging capacitors, heat stressed components etc) with the power disconnected from the TV you will have to apply power to the TV to do further testing to find out what and where the problem is.
If this seems too daunting contact a reputable, professional TV repair service and ask for a quote to repair the TV.
It can be dangerous if you don't know what you're doing. Leave it to the experts.
by jayeff
Can't believe this worked thankyou
Hi @gmanzero
Other than proving that the TV power cord is faulty or not by either disconnecting it from the outlet and the TV and testing it with an Ohmmeter or trying a compatible replacement cord, there are no other options except than to take down the TV from the wall and remove the back cover so that the power board can be inspected and tested.
Here’s an image of the power board, showing the slow blow fuse (white glass fuse) and the surge suppressor (green MOV). These are the components that usually fail if there has been a power surge due to a storm or outage. If the fuse has blown replace it with an equivalent slow blow fuse (rating marked on board near fuse and also on fuse end caps e.g. T5A 250V. The T=Timed which means slow blow. If you insert a standard fuse of the same rating it will blow straight due to the high inrush currents when the power is first connected, whereas the slow blow will hold until this current has subsided. We are talking 1-2 milliseconds here for it to subside.
If the fuse and MOV test OK then connect power to the TV and check if the Standby voltage is appearing on the connector test point as highlighted i.e. 7.5V DC. If it is then it may be a mainboard/power board cable problem or a mainboard problem as the mainboard turns on the red standby power light if it is receives the correct voltage signal from the power board.
If there is no 7.5V DC standby power at the test point then it is a power board problem.
Be safety aware when working in the back of a TV when the power is connected as there is exposed lethal AC voltage on the power board. If you don’t know what you’re doing, then don’t do it. Call an expert to fix the problem.
(click on image to enlarge for better viewing)
I’m assuming that this image of the power board is the correct one for your TV as it is the one that turns up consistently when searching online for Samsung un40mu6290f power board. Just something that you might want to double check if you determine that it is necessary to order a replacement power board.
Comments:
Thanks @jayeff had power after small storm was gone last night on some 10 year old HD Samsung model I still use in bedroom. No red light this morning. Power reset worked fine. Appreciate the help!
by craig taylor
Can't believe this worked thankyou
@xenab11
What is the model number of the TV? (look on the information label on the back of the TV)
Have you checked that the power outlet that the TV is connected to is working OK by plugging in another device e.g. a hair dryer and see if it works OK?
If the TV is plugged intro a powerboard (powerstrip) try plugging it directly into the wall outlet and check.
If the power from the wall outlet is OK then you would have to disconnect the TV from the power and remove the back cover from the TV and inspect the power board for any obvious damage. There is a fuse and a surge suppressor on the board near to where the power input connects and these would have to be checked by using a DMM's (digital multimeter) Ohmmeter function.
When power is connected to the TV the power board supplies a standby voltage signal to the mainboard and it is the mainboard that turns on the red standby power light
by jayeff
We have a samsung smart tv 58” 1080 led tv...had power supply back light etc replaced sept 2018...tv is 2016...and again today tv went off while we were watching it...model no. UN58h5202
Rep: 1
As I said there was a power failure last night and this morning I can dot turn the TV on and there is no stand by light.
I checked the power supply and it works OK. As instructed I unplugged the power supply cable to the main board and the back light came on and the power supply voltages were OK. I checked the Main board and found no damage or bad connections or components. We still do not get the standby light and can not turn the TV on. One suggestion that was made was to replace the main board. Can you tell me the price of the board? The last suggestion was to tap the relay on the main board to try to un stick the contacts. I found no relay. What else have you got?
Hi @jumbles44,
What is the model number of the TV?
You said that the “…. power supply voltages were OK.” Does this mean that the Standby Power voltage at the ref point on the power board was checked and OK? The STBY voltage ref point is usually marked on the power boards in Samsung TVs
If it was OK did you verify that it was also getting to the mainboard OK?
Can’t tell you the price of the mainboard as there is no mention by you what the TV model number is, at least not on this forum anyway
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I have tried what you suggested. There was no storm or power surge. There is power going to TV. the power cord goes from an outlet to the TV.
by lainiest
I have this same problem too. Please help me. I was watching television and suddenly Samsung TV shuts down just now. I tried to turn it back on bug nothing happened. I pull off the cord and put back in and turn off/on switch. Nothing changes. Please help me. I'm so gonna get kill by my mum. And the TV haven't reach one year.
by Bernie
Heloo pano kung sinaksak ko ung plug tpos umilaw nman tpos nmmatay din...ano kaya problema nia.tnx
by Alexander Flores
The same problem. When I plugged in the usb, it did not show the files on the screen. Then I plugged the usb out, suddenly the tv shut down. And when I tried to turn it back on, it did not. And nothing happen. I tried several times but it's still dead. What might be the problem and how can I fix it?
by pcolon30
My samsung smart tv done the same and its only 4 weeks old..fine one minute and switched it off..came back a few hours later and its dead..getting a replacement tommorrow
by Irish outdoors
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