And if you don't have the thermal camera, you can do the alcohol version - wet it down and throw power to it the shorted part evaps the alcohol darn near immediately. No, it wont go up in flames because it'll evap before it gets that hot.
What would you say if I have 3.3volts on standby, ac off detect and power on(when power button is pressed) but nothing on the 12 volt pins? I have a Sony Bravia with 2 blinking lights not turning in
At 6:50 so far and since noting is getting hot, my thinking goes towards a popped resistor or something similar like that (maybe diode) that is not feeding voltage where it needs to go. Obviously just a guess here. Ok, back to video.
I noticed that main chip that was greeting hot is hot as soon as I plug in the tv and turn it on (no screen but the little red light is on) nothing visably wrong with the power board. If I u unplug the power from the main board, the backlight turns on. I also noticed if I put my ear to the main board, it is making a sound like lazer blasters shooting (quietly) lol any chance that's a sign the main board needs to be replaced?
I have a question. You said you were injecting 3.3 volts from a power supply. Was this constant current or over current protection? And what amps did you use? .2? Thank you for your time making this video.
I’m having white vertical lines 3 inches in thickness every other 3 inches on the screen it’s behind the picture. Any idea what this can be? It’s a Samsung UN75MU6300F. I’ve unplugged the white flat cables and back together still same thing?
We have like over 10 of those mainboards at the workshop I work at. We never do component repairs on TVs unless it's a known problem, like the caps on those old tube-backlight TVs And I don't mean CRTs, I mean the flatscreens that came before they started using LED backlight
Yeah, my boss is about to retire, having worked various repairman jobs in his 50 year career so it's always fun when we get an older unit into the workshop and he instantly knows what wrong just by taking a look at it. By the way, if you ever get one of the newer models of Samsung into your workshop and the standby LED blinks twice, that's an error code for the panel. Either the LCD itself or the backlight. There was a period when we got so many TVs into the workshop that I had to transition to only doing TVs and soundbars, aka Warranty repairs, while a colleague of mine transitioned to only doing non-warranty audio repairs. Old amps and other misc stuff like that. My successrate is a lot higher than his, but replacing circuit boards is a lot more easy, and a lot less rewarding than component repairs, so it's a double edged sword.@@12voltvids
A good one is rather expensive. For my setup for example I have HDMI over Ethernet. To upgrade to 4k means a 4k Ethernet adapter and the cost is about 600.00. I'll stick with 1080p. Good enough for me.
can you read errors of a PCB main board, or have somewhere to find out what an error number refers to? my literal brand new samsung TV is broken because they manufacture pieces of sh*t, and the tech who came to "fix" it said the PCB is trashed. which makes sense, because its made from trash. The error was something like error code 64.. whatever that means. I can't find anything about it. My TV would turn to a noisy image, and sometimes make a sound like a relay was exploding. these TV's don't have relays, so I am not sure what it was. I am just curious what the error meant.
I recently just bought a new TV from Walmart that has both HDMI component and composite video inputs. The composite shares the component input. Things up there in Canada must be different than here in the United States
@@lox_5017 I don't count how many of each brand breaks. Just saying that with more Samsung tvs sold obviously more are going to break. All things being equal, say Samsung sells 100 sets lg 75, Sony 50, rca 25. Our of those 250 TV's 3% break down at the 5 year mark. What brand will have the most tvs that break? I'll give you a hint. Back when rca was the top seller in north America. Guess what brand had the highest failure rate. Go into a TV shop and the shop was full of RCA and zenith TV's so I've would think those brands were unreliable. The shop i worked at was a big Sony dealer actually one of the largest independent Sony dealer in Canada at one time. Guess what brand was jam lacking the service dept?
@@12voltvids Now that was an answer reply I was looking for. Why in hell didn't you reply like this the first time around. You seem to be very biases when it comes to certain brands on certain products.
i am being given a 75" 4k smart tv made by lg from a friend it lasted 6 months before the power supply crapped out on it so he went and bought a new one
@@12voltvids my buddy knows how much I hate this stuff but he's sure I can fix it and I get a bigger TV out of it or worse case I strip it for a few parts
While your missus is baking cookies throw that mainboard in at 240 c for 15 minutes. Might reflow out a solder ball short if you and your missus are lucky. Enjoy the cookies.
@@allen5976 at 240. No chance. Several successes doing the old shake and bake . A few youtube vids on the matter. And even if so, what have you got to loose exept for a few cookies
@@12voltvids not a chance. You used to say you’d repair anything but a disposable modern tv. I totally understand doing it for yourself or out of necessity for inputs. But your last several videos have been awesome. Always neat to see others’ train of thought. Thanks as always for putting the work into sharing everything with us.
They did replace the set once they found out the board was not available and i was paid zero, plus I had to take it to recycling. And people wonder why i don't want to fix TV's.
And if you don't have the thermal camera, you can do the alcohol version - wet it down and throw power to it the shorted part evaps the alcohol darn near immediately. No, it wont go up in flames because it'll evap before it gets that hot.
Good one. Thanks.
What would you say if I have 3.3volts on standby, ac off detect and power on(when power button is pressed) but nothing on the 12 volt pins? I have a Sony Bravia with 2 blinking lights not turning in
At 6:50 so far and since noting is getting hot, my thinking goes towards a popped resistor or something similar like that (maybe diode) that is not feeding voltage where it needs to go. Obviously just a guess here. Ok, back to video.
I noticed that main chip that was greeting hot is hot as soon as I plug in the tv and turn it on (no screen but the little red light is on) nothing visably wrong with the power board. If I u unplug the power from the main board, the backlight turns on. I also noticed if I put my ear to the main board, it is making a sound like lazer blasters shooting (quietly) lol any chance that's a sign the main board needs to be replaced?
hopefully you can come back to this so we can see it going
Looking for a board now. They seem to be in short supply.
How do you know where to inject voltage? Did you need to look at a schematic for that?
I have a question.
You said you were injecting 3.3 volts from a power supply.
Was this constant current or over current protection?
And what amps did you use?
.2?
Thank you for your time making this video.
I had the power supply set to 200ma
I’m having white vertical lines 3 inches in thickness every other 3 inches on the screen it’s behind the picture. Any idea what this can be? It’s a Samsung UN75MU6300F. I’ve unplugged the white flat cables and back together still same thing?
How did you remove the black dissipator please ? Pulling hard ? Thank you I have to remove mine
Great work! Do you know where the 8GB of non-volatile memory is on that board?
We have like over 10 of those mainboards at the workshop I work at.
We never do component repairs on TVs unless it's a known problem, like the caps on those old tube-backlight TVs
And I don't mean CRTs, I mean the flatscreens that came before they started using LED backlight
Ccfl. Cold cathode fluorescent lamps
Yeah, my boss is about to retire, having worked various repairman jobs in his 50 year career so it's always fun when we get an older unit into the workshop and he instantly knows what wrong just by taking a look at it.
By the way, if you ever get one of the newer models of Samsung into your workshop and the standby LED blinks twice, that's an error code for the panel. Either the LCD itself or the backlight.
There was a period when we got so many TVs into the workshop that I had to transition to only doing TVs and soundbars, aka Warranty repairs, while a colleague of mine transitioned to only doing non-warranty audio repairs. Old amps and other misc stuff like that.
My successrate is a lot higher than his, but replacing circuit boards is a lot more easy, and a lot less rewarding than component repairs, so it's a double edged sword.@@12voltvids
@@BananShakeProduction i did component level for my entire career. I left before the board swapping started.
Hey Dave, what is that IR camera you are using? What kind of resolution is needed for this kind of work?
It's an infiray, i reviewed it. I have 3. Resolution is good enough for this work.
So if you replace the motherboard, with the same working board from a different tv, original remote won't work right?
It will if it's the same series of tv. I have done that.
Superb get some more on this vedio thanks a lot for the clear teaching methord
If you can't get the original part, there are universal replacement mainboards that have component input.
It was scrapped
I connected my old Sony VCR to my new LG OLED TV using an inexpensive component to HDMA adapter from Amazon.
Would a component to HDMI adapter be uneconomical?
A good one is rather expensive.
For my setup for example I have HDMI over Ethernet. To upgrade to 4k means a 4k Ethernet adapter and the cost is about 600.00. I'll stick with 1080p. Good enough for me.
can you read errors of a PCB main board, or have somewhere to find out what an error number refers to? my literal brand new samsung TV is broken because they manufacture pieces of sh*t, and the tech who came to "fix" it said the PCB is trashed. which makes sense, because its made from trash. The error was something like error code 64.. whatever that means. I can't find anything about it. My TV would turn to a noisy image, and sometimes make a sound like a relay was exploding. these TV's don't have relays, so I am not sure what it was. I am just curious what the error meant.
I have no idea because I don't fix tvs for a living anymore and haven't for over 20 years. Mostly audio and vcrs these days.
Dave Don’t they sell a hdmi to Composite converter they sell them here in Australia then I can buy a new TV
Unless you get a really high end model the cheap ones dova poor job of scaling or cause too much delay
I recently just bought a new TV from Walmart that has both HDMI component and composite video inputs. The composite shares the component input. Things up there in Canada must be different than here in the United States
Samsung no longer has it aparantly. I don't have a new one so i don't know. My newest set has both composite or component but not at the same time.
The samsuck has died
@@ACommenterOnUA-cam my Samsung 4k has those stupid 3.5 mm stereo headphone a/v and component inputs.
Are you needing any more spare parts am willing to send you some electronic parts for any use just need a way to contact you
How many Samsung tvs does this make that came in for repairs? Are Samsung that bad?
Number 1 tv brand of course more will break.
@@12voltvids your reply didn't make sense. I don't think you understood what I was trying to ask.
@@lox_5017 If brand A sells 100 TVs, brand B sells 50; and 6 of brand A TVs broke, and 4 TV of brand B broke; is brand A worse than brand B ?
@@lox_5017 I don't count how many of each brand breaks.
Just saying that with more Samsung tvs sold obviously more are going to break.
All things being equal, say Samsung sells 100 sets lg 75, Sony 50, rca 25.
Our of those 250 TV's 3% break down at the 5 year mark.
What brand will have the most tvs that break?
I'll give you a hint. Back when rca was the top seller in north America. Guess what brand had the highest failure rate.
Go into a TV shop and the shop was full of RCA and zenith TV's so I've would think those brands were unreliable.
The shop i worked at was a big Sony dealer actually one of the largest independent Sony dealer in Canada at one time. Guess what brand was jam lacking the service dept?
@@12voltvids Now that was an answer reply I was looking for. Why in hell didn't you reply like this the first time around. You seem to be very biases when it comes to certain brands on certain products.
i am being given a 75" 4k smart tv made by lg from a friend it lasted 6 months before the power supply crapped out on it so he went and bought a new one
Par for the course for this modern shit.
@@12voltvids my buddy knows how much I hate this stuff but he's sure I can fix it and I get a bigger TV out of it or worse case I strip it for a few parts
That main board goes all the time. The set is worth repairing. Ps Every brand has issues.
In customers hands now. He will device if he wants to wait for parts.
Where can I get that thermal module from plz ?
Here is the link to the review.
ua-cam.com/video/20V996pRyHg/v-deo.htmlsi=A9yBG0s38bWgpYpX
It's not cheap. Over 459 from Amazon
Well aint that a bugger :-(
No heatsink on the chip.
Im still sure its done on purpose
Someone was sleeping. There was a huge heat sink on it. I removed it for testing.
My sleep is often broken. Maybe thats causing problems.
I didnt know anything was wrong.
While your missus is baking cookies throw that mainboard in at 240 c for 15 minutes. Might reflow out a solder ball short if you and your missus are lucky. Enjoy the cookies.
And blow up the capacitors!
@@allen5976 at 240. No chance. Several successes doing the old shake and bake . A few youtube vids on the matter. And even if so, what have you got to loose exept for a few cookies
Give the board to the customer tell them to send it to Samsung Repair Service they are a independent company that repairs Samsung Boards.
man, stop fixing these garbage disposable TVs. You gotta stick to your guns 😂 great vid as always.
So i should stop fixing everything is what you are saying.
@@12voltvids not a chance. You used to say you’d repair anything but a disposable modern tv. I totally understand doing it for yourself or out of necessity for inputs. But your last several videos have been awesome. Always neat to see others’ train of thought. Thanks as always for putting the work into sharing everything with us.
Why doesn’t the customer just get a component-to-HDMI converter?! So silly.
They did replace the set once they found out the board was not available and i was paid zero, plus I had to take it to recycling. And people wonder why i don't want to fix TV's.
Change the chip ....
And just where would i get the chip?
Samsung TVs seem to be really shit...