Five years after you have published this video and still the best practical illustration of fault finding I have ever seen.... 25 years in the electronic trade myself. Well done.. to the point and straight forward.
Thanks for the video. It was helpful to see the troubleshooting process. For the benefit of future viewers, the video boils down to: 1. Checking voltage across the circuit to see roughly where the issue occurs. 2. Replacing a bunch of capacitors that seemed faulty (but it turned out they were OK?) 3. Replacing a transformer that seemed faulty (which was faulty and this fixed the issue). It's good to see the tiny tips and tricks used in the video (e.g. bridging the 3.3V pin with the ON/OFF pin to mimick pressing the power button the circuit?).
@@hambatuhan4309 Unfortunately I'm not aware of what transformer was used. The video doesn't zoom in enough to read the model number on it. However, if you plan on doing some repairs, I would suggest reading the model number of the transformer on the defective board, and ordering the same transformer to ensure equivalent electrical properties.
Awesome video. I just wish everyone could convey their message as clearly as this gentleman.He has a way of explaining things that everyone can understand. Kudos to you sir.
He didn't explain anything in this video, he was just testing various components that are most likely to fail and can be easily tested with a meter. There was no REPAIR in this video, only some basic trouble shooting. I was doing this sort of testing at the age of 16. Big deal, he tested a fuse some diodes and a cap, the transformer wasn't faulty but he gave an indication that it was.
Same card new chahiye, kaha se milega aur approx price kya hogi? Because mere case me power supply ki IC aur backlight LED ka step up transformer bhi kharab hai jo mil nahi raha hai
Tip: don’t use such a stiff bristle brush to clean the board and don’t be so rough. This could make your problems worse if you dislodge something that was already working. Compressed air is best or a smaller detail brush.
Yo tengo un chasis igual, y no encontré ningún componente abierto ni en corto, todos los capacitores están en buen estado, no hay corto en los transistores, que elemento podrá estar dañado?
My local Burger King got rid of two NEC p462 multisync monitors I disassemble them and cleaned them thoroughly one of them turned without a problem I been using that one it's what I watch TV game and run my pictures on the other one the after plugging in it and turning it on the screen lights up then goes black and a red light begins to Blink on the bottom right corner of the trim then turns off the entire system what could be wrong question
I have LG model 65UK6500AUA, when I it turn on my TV with in 30 to 60 seconds it turn off and then turns on again. I can push the off button on remote and will turn off. I read couple of places it my sleep timer is set and for me to go to settings and turn off sleep timer the only problem the turns off to fast for me to able to do that process. Help
Very nice video. I have lg 42lf20fr. Problem - When I start the TV it turns on, picture displays for 3 to 5 seconds and then the TV goes back to standby mode. Power LED remains on. It is like TV has been switched off. Any idea of what can be the causes? Thanks in advance.
I REALLY NEED HELP the monitor is a mg248q, when I plug it in the indicator light comes on right away and stays on at all times unless it unplugged. The display port is broken because I broke it. The other ports are fine but nothing shows up on the screen when I plug other things in and I can't get the monitor to do anything its just a black screen no menu PLEASE SOMEONE HELP I CAN'T FIND ANYTHING ONLINE!
Hi Thks for your guide.Mine is a bit different than this psu. My model is ADP-40AF of an acer flat scrren. Blowing fuse plug now. Cannot find exact fault.
Im not trying to hate or anything but I would highly not recommend this video for anybody for a couple main reasons. 1 there is no guidance or step by step directions which is highly very important when using a voltage meter with live boards and electricity. 2 you don't tell or show anyone how to use or what setting should the voltage meter be on and the connections not showing or even mentioned when switching modes to live power, which is very dangerous. Having the the connections from the first testing and not switched can electricute the people that doesn't know anything about having to switch them. For future videos that you create please specify the main important safety concerns with basic step by step instructions. I say this cuz I do not know how to use a multi meter on every mode and what connections do need switched. But dc I do know and 1 other but not a.c. mode. Although I have had used a.c. mode before with live wire but it was already setup by a friend that knew how to use it and also explained to me on what way the mode and connections go for a.c. but since I ain't used that mode in a long time I forgot which way it all goes
Hello sir! i have a similar problem. The voltages on the output pins are flickering and not stable and the tv is not turning on.. Checked capacitors or any other burnt signs and havent seen anything suspicious. Do you have any clue to where i should start measuring or removing first?
Hi Sir, thx a lot for your precious video. I think that my power board (samsung 19'') have the same failure of your. In your power board the short are in the primary winding? Practically all inverter has a primary "short". Moreover, how is it possible that a broken inverter (section for high voltage power led lamp) prevents reading the low voltage of 5V at the output of the board? There is something that is not clear to me
Hi been trying some solution ..got temporary Solution by using my tv as monitor by connecting hdmi cable cause its working but need to know whats the reason why my laptop display not working..any idea.its great help.thank you..
Without the XMFR, there will be no high voltage for the fluorescent tubes, so the display will be black. I had one of these, one of the fluorescent tubes was duff, dragging down the output, the power supply protection circuit activated and turned off the supply to stop the smoke from coming out. Tossed it and went to the Salvation Army Thrift Store and found one just like it for $9.99.
my monitor power supply has 8.5Vdc at output of main bridge rectifier and 0.14Vac at output of switching transformer no output voltage but it shock me even switch button.
Please need help. I have LG monitor my pc runs good (tested anoter TV) but my monitor says no signal. Cable is good. What can cause it at monitor. Whats the problem?
Thank you for the video, I am subbing. If you plug the power into the monitor and the indicator light blinks once, but you still can’t turn on the monitor, what do you think the issue might be?
May I request a schematic diagram of that printed circuit board to know the path layout.. If you check the component in resistance circuit board the value of component like diode, resistor change. and there is no exact value resistance test to be measured whether it us defective or not. Unless you re. Move it from the circuit board.
On my samsung plasma tv that has no power or standby red light. I took the back of tv off.i looked at the front of the tv and i see 4 small dime size white dots. And i looked at back where they are coming from and there are 2 black with silver holder. I took it off than i got 3 white dime size dots, right behind the black and silver bracket
My monitor wont turn on now but sometimes it will turn on if i keep plug and unplug and every time i do that the power led turn on and off to can you help me whats the problem?
+Good mind Good find its very simple .. the first side is the same as measururing a diode or LED .. the other side is just like a trandistor but with two pins :)
Admin br..when I connect my LCD AOC monitor with UPS , UPS turned off its getting of but when I unplug the monitor thn the ups is going better, what's the prblms in monitor pls help me.
Sir i have wansa smart tv wle49d8856s its starting with smart tv loading then wansa and after that nothing but screen light can you or any one have an idia of where to get its firmware i will be greatfull
A perfect guide on how to waste as much time as possible during repairs... If your light in your living room is not turning on, do you start to meassure the voltage on the powerline supplying your whole street or just directly taking a trip to the powerplant to start there? Bridge rectifiers can and should be tested without putting high voltage on even with your multimeter, meassuring the output voltage would not show you if one or even two diodes were dead (signal form and the frequency of the pulses are needed for that, if you want to test it using output voltage). As for caps: ESR is a much more important parameter in switching mode power supplies and meassuring the capacitance of that cap when you alredy had 0 volts at the output equals to messuring the diameter and the density of a growing tomato, to find out the max. speed of your car on mars...
Sumsung LCD monitor Syncmaster SA10, Power হঠাৎ অফ হয়ে যায়, কিছু সময় র পাওয়ার আবার আসে, সর্বোচ্চ এক মিনিট চলে আবার বন্ধ হয়ে যায় ৷ কি সমস্যা হতে পারে, জানাবেন প্লিজ ৷
I would suggest getting a basics electronics book so you know how to test, trace and understand how it works to repair them. Heck compaired to when I was a teenager and you have to know about vaccumm tubes today is easy. Back then you replaced bad components not just the boards like today.
Brushing it off not talking and using multimeter and not discussing what you're doing exactly has no benefits here. Some may you understand some of it, some all of it, but if you can at least near rate what you're doing then you're wasting people's valuable time. So this is a thumbs down and not recommended to watch.
Five years after you have published this video and still the best practical illustration of fault finding I have ever seen.... 25 years in the electronic trade myself. Well done.. to the point and straight forward.
Thanks for the video. It was helpful to see the troubleshooting process. For the benefit of future viewers, the video boils down to:
1. Checking voltage across the circuit to see roughly where the issue occurs.
2. Replacing a bunch of capacitors that seemed faulty (but it turned out they were OK?)
3. Replacing a transformer that seemed faulty (which was faulty and this fixed the issue).
It's good to see the tiny tips and tricks used in the video (e.g. bridging the 3.3V pin with the ON/OFF pin to mimick pressing the power button the circuit?).
Thank you! Just what I needed!
can you tell me the name of the tranformer? where can i find it?
@@hambatuhan4309 Unfortunately I'm not aware of what transformer was used. The video doesn't zoom in enough to read the model number on it. However, if you plan on doing some repairs, I would suggest reading the model number of the transformer on the defective board, and ordering the same transformer to ensure equivalent electrical properties.
Awesome video. I just wish everyone could convey their message as clearly as this gentleman.He has a way of explaining things that everyone can understand. Kudos to you sir.
Judging by the hands and fingernails.....he is a she.....
He didn't explain anything in this video, he was just testing various components that are most likely to fail and can be easily tested with a meter.
There was no REPAIR in this video, only some basic trouble shooting. I was doing this sort of testing at the age of 16.
Big deal, he tested a fuse some diodes and a cap, the transformer wasn't faulty but he gave an indication that it was.
Same card new chahiye, kaha se milega aur approx price kya hogi? Because mere case me power supply ki IC aur backlight LED ka step up transformer bhi kharab hai jo mil nahi raha hai
Tip: don’t use such a stiff bristle brush to clean the board and don’t be so rough. This could make your problems worse if you dislodge something that was already working. Compressed air is best or a smaller detail brush.
I use an angle grinder to clean my boards.
@@spacejihadist4246 Bead blaster cabinets also work great!
why did you not put back the transformer? or did you replace it with new one?
Thank you man ! I've fixed my old monitor. In my case it was a fuse !
I am happy to hear that you have repaired yours :D
IsDeno24 छोटेऐसबलीपासट.केसेलगातेहे
No entendí que hizo, cambio el transformador, y que valor de resistencia utilizo para las mediciones.
Wow! My friend that meter has definitely been around :)
What is the name of that transformer and what is the value of it?
Are the voltages marked on the board?
Mine was a blown capacitor and a solder point that came loose, total cost of fix was $1.95 and an hour of my time.
YOU FIXED IT BY REMOVING THE TRANSFORMER?
Was wondering the same thing. So how was this fixed?
That transformer is a decepticon.
Yo tengo un chasis igual, y no encontré ningún componente abierto ni en corto, todos los capacitores están en buen estado, no hay corto en los transistores, que elemento podrá estar dañado?
My local Burger King got rid of two NEC p462 multisync monitors I disassemble them and cleaned them thoroughly one of them turned without a problem I been using that one it's what I watch TV game and run my pictures on
the other one the after plugging in it and turning it on the screen lights up then goes black and a red light begins to Blink on the bottom right corner of the trim then turns off the entire system what could be wrong question
I have LG model 65UK6500AUA, when I it turn on my TV with in 30 to 60 seconds it turn off and then turns on again. I can push the off button on remote and will turn off. I read couple of places it my sleep timer is set and for me to go to settings and turn off sleep timer the only problem the turns off to fast for me to able to do that process. Help
Very nice video. I have lg 42lf20fr. Problem - When I start the TV it turns on, picture displays for 3 to 5 seconds and then the TV goes back to standby mode. Power LED remains on. It is like TV has been switched off. Any idea of what can be the causes? Thanks in advance.
You have some backlight led burned, the tv switch off to prevent damages
sorry bit it wasnt clear what terminal points in the connector that you jumpered out (or bypassed) . thanks
On/OFF with 3.3V
Last step when you remove the coil
Did you replace it or solder it back
Waiting your reply
Replace because it was faulty
Where to find another one
Or which device use same coil
they are almost the same , whatever you can find it will work :)
My LCD TV was on
Then semply turned off and not working again
No even standby light
that means that you have a Problem on the Hot side of the power supply
That screen motherboard looks less complicated than the one I have 🧐
I dont see you fix it yet. But i can tell you are professional
I REALLY NEED HELP the monitor is a mg248q, when I plug it in the indicator light comes on right away and stays on at all times unless it unplugged. The display port is broken because I broke it. The other ports are fine but nothing shows up on the screen when I plug other things in and I can't get the monitor to do anything its just a black screen no menu PLEASE SOMEONE HELP I CAN'T FIND ANYTHING ONLINE!
Hi Thks for your guide.Mine is a bit different than this psu. My model is ADP-40AF of an acer flat scrren.
Blowing fuse plug now. Cannot find exact fault.
Hammer Time
hello I have a sansum monitor and I don't know the IC number of the source, is of 8 pins, help me please. s/n syncmaster E1920NX..THANK
If backlight not turn on...it makes monitor down ?
I am getting 2.5v from output. What should i do?
کیا کیپیسٹر ڈایوڈ کی جگہ کام کرتا ہے؟ جیسے آپ نے پہلے ایک ویڈیو میں کیپیسٹر کے دو ٹانگوں کو جوڑ کر ڈایوڈ کی جگہ لگایا تھا فلپس کی ایل ای ڈی میں۔
Im not trying to hate or anything but I would highly not recommend this video for anybody for a couple main reasons. 1 there is no guidance or step by step directions which is highly very important when using a voltage meter with live boards and electricity. 2 you don't tell or show anyone how to use or what setting should the voltage meter be on and the connections not showing or even mentioned when switching modes to live power, which is very dangerous. Having the the connections from the first testing and not switched can electricute the people that doesn't know anything about having to switch them.
For future videos that you create please specify the main important safety concerns with basic step by step instructions. I say this cuz I do not know how to use a multi meter on every mode and what connections do need switched. But dc I do know and 1 other but not a.c. mode. Although I have had used a.c. mode before with live wire but it was already setup by a friend that knew how to use it and also explained to me on what way the mode and connections go for a.c. but since I ain't used that mode in a long time I forgot which way it all goes
Hello sir! i have a similar problem. The voltages on the output pins are flickering and not stable and the tv is not turning on.. Checked capacitors or any other burnt signs and havent seen anything suspicious. Do you have any clue to where i should start measuring or removing first?
Check the CCFL tubes.
Pls good evening my name is Peter and am a computer hardware and want no how we use meter to check diod and capacity.
Hi Sir, thx a lot for your precious video. I think that my power board (samsung 19'') have the same failure of your.
In your power board the short are in the primary winding? Practically all inverter has a primary "short". Moreover, how is it possible that a broken inverter (section for high voltage power led lamp) prevents reading the low voltage of 5V at the output of the board? There is something that is not clear to me
both coils in the transformer should have continuity one of the coils was broken (not a short but an open).
@@Wingnut353 the secondary of the transformer had resistance, but too high for the meter to beep, it was not open circuit.
5volt aur 15volt dono blanking hota hai key?
Hi been trying some solution ..got temporary Solution by using my tv as monitor by connecting hdmi cable cause its working but need to know whats the reason why my laptop display not working..any idea.its great help.thank you..
Amazing you had no voltages before you turned it on!
Without the XMFR, there will be no high voltage for the fluorescent tubes, so the display will be black.
I had one of these, one of the fluorescent tubes was duff, dragging down the output, the power supply protection circuit activated and turned off the supply to stop the smoke from coming out. Tossed it and went to the Salvation Army Thrift Store and found one just like it for $9.99.
my monitor power supply has 8.5Vdc at output of main bridge rectifier and 0.14Vac at output of switching transformer no output voltage but it shock me even switch button.
Please need help. I have LG monitor my pc runs good (tested anoter TV) but my monitor says no signal. Cable is good. What can cause it at monitor. Whats the problem?
thank you, in my case was the TL431
Wow this is awesome 👏🏻
Why ends the video recording
I wish you could do some talking for us beginners intermediate to understand what you are doing.
He doesnt really know. Hes just tryin stuff.. BUT he does have decent instincts ts if he would just read some books and learn from some pros.
Thank you for the video, I am subbing. If you plug the power into the monitor and the indicator light blinks once, but you still can’t turn on the monitor, what do you think the issue might be?
May I request a schematic diagram of that printed circuit board to know the path layout.. If you check the component in resistance circuit board the value of component like diode, resistor change. and there is no exact value resistance test to be measured whether it us defective or not. Unless you re. Move it from the circuit board.
what do u call to the last one u removed? is that a inductor coil?
+Ynna Agadi that's a step up transformer for the back light :)
Did you replace it with a new one? Or did you do something to the one you took out?
MobaScout it wasn't new it was from another board
Okay, great. Thank you for the quick reply. I'm trying your methods of diagnosing the issue, but i am not as skilled. Very helpful :)
On my samsung plasma tv that has no power or standby red light. I took the back of tv off.i looked at the front of the tv and i see 4 small dime size white dots. And i looked at back where they are coming from and there are 2 black with silver holder. I took it off than i got 3 white dime size dots, right behind the black and silver bracket
What was the problem? A coil?
You could probably find a bigger brush to dust off the board if you tried really hard !! Hahahaha !!
Hi boss how to repair low voltage output driver led thank u pls help me
My monitor wont turn on now but sometimes it will turn on if i keep plug and unplug and every time i do that the power led turn on and off to can you help me whats the problem?
Check all electrolytic capacitors and look for broken solder joints
@@wi_zeus6798 the caps are in good shape
@@limwellz did you measure the ESR / capacitance?
Thank you my friend
Power doesn't not turned on for somedays and again it turns on after somedays. Anybody ever face this same problem? Please help..
sir can your please tell us how to check COUPLER which connects two circuits together from hot to cold
+Good mind Good find its very simple .. the first side is the same as measururing a diode or LED .. the other side is just like a trandistor but with two pins :)
IsDeno24.
thank you
когда вы заменили на новое устройство, которое вы распаяли в 9.12 минут ?? , я не видел новую пайку
Watching my friend👋
sir blaster is faulty plz open caption complete check plz blaster or pfc idont know its name
Diodes should be removed prior testing
Admin br..when I connect my LCD AOC monitor with UPS , UPS turned off its getting of but when I unplug the monitor thn the ups is going better, what's the prblms in monitor pls help me.
I have a 42” element tv the model # is elefs421a input power # ac120v-60hz,75w the power light come on but no picture or sound what wrong
ur backlight problem
Thank u this is very useful to me
how to discharge big caps without fireworks
Lightbulb rigging touch wires to the legs carefully light will illuminate a little then check voltage. If it’s low, put a screwdriver across the pins.
By high you mean above 50 volts?
Sir i have wansa smart tv wle49d8856s its starting with smart tv loading then wansa and after that nothing but screen light can you or any one have an idia of where to get its firmware i will be greatfull
Tcon board
@IsDeno24 can you find me this chopper transformer SPW-118 from DELL 22" powerboard?
Rewind using wire. It wiil work
Sir ic831(pls ic number tell me 8pin ic)
sharp t v ki e h t shot ho gai hai or e h t ka nambar mit gaya hai e h t ka nambar kese pata kare bataiye
sir you shorted two pins on the connector. what are those two pins for
+Good mind Good find the pins are for the switch that turns on the cold side of the board :)
3.3v and gnd
hai MY Toshiba TV has half screen what's the problem
t con board
Maybe this board is Samsung.
well did you fix it or what. need to talk explain it. thank you though
Agree there... I'm a tech of 25yrs and always explain what went wrong and how to solve it..
sir plz tell me beeb was ok upper side and lower side its give readings which one is ok??? whats da name of this. is this blaster??
OK
Please short the Electrolytic capacitor thy bite
How to test a Resistor in a circuit
th-cam.com/video/HkL6PPDfW0w/w-d-xo.html&t
Sir,my aoc e970swnl monitor power controler i.c damage and destroy i.c value how can i find i.c perfect value
+MAYUR MADANKAR the power board is only 10-15$ on ebay buy a new one :)
Sir,can u please give me ebay link which power board is perfect and thanks a lot sir.
A perfect guide on how to waste as much time as possible during repairs... If your light in your living room is not turning on, do you start to meassure the voltage on the powerline supplying your whole street or just directly taking a trip to the powerplant to start there? Bridge rectifiers can and should be tested without putting high voltage on even with your multimeter, meassuring the output voltage would not show you if one or even two diodes were dead (signal form and the frequency of the pulses are needed for that, if you want to test it using output voltage). As for caps: ESR is a much more important parameter in switching mode power supplies and meassuring the capacitance of that cap when you alredy had 0 volts at the output equals to messuring the diameter and the density of a growing tomato, to find out the max. speed of your car on mars...
My tv stop working no power.can you help me
Bro y diode shows reading double side
inductor problem ?!
Oh great, an electronic mime.😊
Super boss
Smps border k 24V YA 12V Kasa la sakta ha.khya sa. And Kitna AMP?
Gus good boy
Sumsung LCD monitor Syncmaster SA10, Power হঠাৎ অফ হয়ে যায়, কিছু সময় র পাওয়ার আবার আসে, সর্বোচ্চ এক মিনিট চলে আবার বন্ধ হয়ে যায় ৷ কি সমস্যা হতে পারে, জানাবেন প্লিজ ৷
বাই আফনে আসলেই খাস বাঙ্গাল। আর এই সমস্যাটা আমার hp v194 18.5 inch তে হচ্ছে
VIDEO FATTO VERAMENTE MOLTO BENE MERITI TANTI LIKE
Sir meri lcd power saving mode me gayi huvi hai ..,
Bhai Meri AOC Monitor ki power supply me problem aa gai hai usko thik kar do...
my TV can't go on it's a Telefunken 55" model TLEDD5-55 FHD
MÜKEMMEL
Dell monitor hai.... solutions batao
My dear friend, couldn't you find a bigger brush? :))))
Sir I want To learn Lcd Led Repairing, Can Anybody Knows, Who Can Give Me Classes
I would suggest getting a basics electronics book so you know how to test, trace and understand how it works to repair them. Heck compaired to when I was a teenager and you have to know about vaccumm tubes today is easy. Back then you replaced bad components not just the boards like today.
@@brianperry4815 sir I want your WhatsApp no
fist time no power my card then i chang ic after come power but not led come but monitor not on white is problem
u forgot to reinstall the display ribbon
пипец каждый своё изобретает где общие стандарты детали потом хрен подберёшь ..ещё глобализация
very gooood
Mine just beeeeeepppppppssssssss
see otto
Bolkar samjhateto air samjhme achoo Tarah se ata
Repair led power supply board in tamil from youtube
Moniter on hota hai turat off ho jata atomatic
sir my TV Philip 32pfl5624h/12 red light blinking what is d solution
I think you have to give him a little more to go on. With the stand by light blinking it could be the power supply board or the main board.
mirs ok
ajay
शिवा इलेक्ट्रॉनिक सिरोंज
Brushing it off not talking and using multimeter and not discussing what you're doing exactly has no benefits here. Some may you understand some of it, some all of it, but if you can at least near rate what you're doing then you're wasting people's valuable time. So this is a thumbs down and not recommended to watch.