Good video but unfortunately it is not worth fixing :/

@LearnElectronicsRepair

2 жыл бұрын

@rkan2 I think you are missing the point of this channel LEARN electronics repair 😉Here's my reasons I think it was worth repairing 1/ Surely if you are learning to repair electronics you need to get you hands on as much stuff as you possibly can and try to fix it? 2/ Regardless whether it is 'worth it' in monetary terms, what price would you put on the education and learning experience from fixing faults like these? The next time you come across a similar problem on something worth more money, you then have some knowledge and experience to apply to that repair yes? 3/ The owner actually wants this repairing and will pay me if I finish the job - I won't charge him much money, probably €20 plus the cost of the parts. Seeing as I used it as a good example of an embedded PSU repair and then I'll get enough money for a few days food (or feed my pet cat, Munchito, for a couple of weeks) then why was it not worth it? 4/ Lastly what was the other option? It goes in the landfill, with the associated costs and pollution to the environment and the owner buys another one which will go in the landfill when that one eventually goes wrong? Why is that better than me fixing this one and teaching how to do it? I'm not just saying I'm right and you're wrong - I'm giving four reasons why I think it was worth repairing - so it would be great if you would explain your reasons why you believe it wasn't. And the rest of you guys, what is your opinion?

@rkan2

2 жыл бұрын

@@LearnElectronicsRepair I agree, but I just rate most TN panels and monitors with just VGA sub 10€ in value in working condition.. 5€ in parts and work makes it not worth it. I don't think you implied it is there for the educational content to be worth it to make the full repair worthwhile. Don't get me wrong - I appreciate the content. ;)

@LearnElectronicsRepair

2 жыл бұрын

@@rkan2 And don't get me wrong I'm not being argumentative. I agree in purely value terms it was not worth repairing (though actually in this case it is as the owner, for whatever reason, will pay for it to be repaired). Also I think this is a regional thing - in many parts of the world people will prefer to repair this, probably using parts salvaged from other broken ones, because it simply isn't feasible to buy a replacement due to local economic conditions. In fact actually even in 'wealthy' countries there will be a subset of people who couldn't afford to replace it Regards the purpose for me creating this channel I think if you watch the first ever video I made - almost a year ago and it isn't very well produced LOL - then you will understand why I often use pointless repairs as educational material kzread.info/dash/bejne/k36O27GkqNaZZ8o.html I'm glad you enjoy the content regardless 🙂

@toolsarecool

2 жыл бұрын

@@LearnElectronicsRepair And I would add: It's worth repair simply to keep it in service and out of the landfill/recycling destiny. There is a much bigger cost to discard it than to repair it that I think needs to be considered. If we care enough. ;)

@ksafan838

2 жыл бұрын

@@LearnElectronicsRepair The time spent initially may not be worth the return but like you said the channel is educational and once you learn it, next time spent will be less.

Thanks for another great lesson, I learned how all these components work individually 30 years ago. What they didn’t teach you is a methodical fault finding approach. That’s why I find this channel so interesting and your also a great teacher.

Really good to watch someone who knows exactly what he's doing and having the time/patience to share it with us.

@LearnElectronicsRepair

2 жыл бұрын

Wow thanks 😀

Every one of these video I watch, I learn something new. I cant thank you enough for taking us through your troubleshooting methods and techniques

I very much enjoyed the systematic approach in faulty find, the reasoning and argument. Running through the schematics and interpretation was superb.

I think everything is worth repairing... I get more joy out of fixing broken electronics ... it give me a sense of actual ownership and pleasure ..

Will you post a second part where you finish the monitor and start it up? A successful story is better than a story with no ends 😁 And it also proves you were right and nothing else was damaged only those components.

Very well explained showing spec sheets and actual test results. I appreciate the troubleshooting for educational purposes!👍

I had a good laugh at the "2 minute" disassembly bit. Thanks for these videos. I always learn something.

Am glad i stumbled across your channel. Ive learnt a hell of lot in the few videos ive watched so far...THANK YOU.

Excellent video, particularly the description of the SMPS startup circuitry.

Nice info on the primary switcher "bump start" circuit, interesting, didn't know about that!

excellent video I learned so much. I think it's worth reparing just for the educational side of things, it keeps it out of the landfill and more importantly it's great fun fixing things. I'm watching all your videos and enjoying them all. A big thumbs up from me.

Very nice video. Thanks a lot. I enjoy your teaching/explanatory style!.

I am really thankful for your effort in giving everybody a chance to understand how electronics work. Thank you. Måns from Sweden (Pronounced mawns,)

The video quality is definitly better!

Thank you for sharing your experience and knowhow. You are a great teacher!

Thanks for the lesson. Learned a lot from it.

I've upgraded my video production system, both hardware and software - I'd like to know if you think the video quality and production is: better now no difference worse Please let me know your thoughts

@screen-protector

2 жыл бұрын

For me better, thank you!

@RetroUpgrade

2 жыл бұрын

Very nice video as always 👍. the editing in davinci resolve paid off richard, this looks really nice especially for a first try. and regarding if you should have waited . it's really not needed just upload a short update video with the fix when you get the parts and link it in the description in this video . or in a pinned comment 😀😀 Cheers looking forward to our collaboration 😁

@ksafan838

2 жыл бұрын

Much better. Keep it up.

@Madrrrrrrrrrrr

2 жыл бұрын

Great channel. But i can't hear everything due to your accent. I have this with a lot of Brits. If you articulate a bit more clearly a wank#r like me can follow everything. Btw loved your 980ti video. That got me hooked onto your channel.

I have a very similar one that died last week so this was very interesting. Might have to take mine apart and see what's wrong with mine. Also definitely increased in production quality.

Great info video about how the circuit operates, thanks for sharing :)

@LearnElectronicsRepair

2 жыл бұрын

You're welcome 🙂

Loads of good tips here thank you

@LearnElectronicsRepair

2 жыл бұрын

Thank You 🙂

Really enjoyed the walk through a to b repair process. best scouse electronics repair ever !!!!! well that i have seen anyway :)

@LearnElectronicsRepair

2 жыл бұрын

Hmmm Aye Well.... I'm sorry to shatter your illusions but I'm not actually a scouser. I'm a *potter* from about 50 miles south west of Liverpool en.wikipedia.org/wiki/Potteries_dialect I now live and work in the south of Gran Canaria where the weather is considerably better 🙂

@yanfishtwig2356

2 жыл бұрын

@@LearnElectronicsRepair sorry mate im on the mid wales coast so probably should know the difference. this is why despite spending hours a day on the net ive only commented a handfull of times.... anyway congrats on the 10k subs im looking forward to seeing the channel grow

@yvesrochet3288

Жыл бұрын

@@LearnElectronicsRepair your accent is adorable and pleasant thanks for your sympathic job.

At 26:30, that is not a secondary winding, 3 reasons why look at the ground symbol, it is chassis ground and secondly, you don't have a physical connection from the secondary side to the primary side. Thirdly the black dot and the direction in which the winding is drawn show it's a primary winding. It is in fact a primary auxiliary winding however you are correct in what the winding does.

Great video. Would love to see a part 2 of this monitor working and if replacing that dual mosfet package fixes the problem.

@LearnElectronicsRepair

2 жыл бұрын

The only reason I can think that it wouldn't work is a defective back light lamp - but in my experience that sort of problem just causes the inverter controller IC to shut down because it senses the current drawn by the lamps. It doesn't cause blown Mosfets like in this one. I could be wrong of course in this case, as I said if it still doesn't work I'll make a follow up after the parts arrive - if it does work I'll post in the comments here. Your can buy back light CCFL lamp testers but I don't have one (I only have a back light LED tester)

Excellent tutorial wow thanks keep doing good work

Another very good lesson in life, to be or not to be, depends on the cost. regards.

Great video.Thanks.

Thank you for the video.

Well explained Thank You

amazing as the usual, is part 2 ready yet?

Great video. Thanks a lot

@LearnElectronicsRepair

2 жыл бұрын

Cheers

Effective Series Resistance or ESR. Put some AC current through a capacitor needing to be tested to check the total impedance. For the Switching Power Supply to function, the capaciors can not be out of range and have too much ESR. Fortunatly the capacitors are bulged and show they are bad and testing them will show they are too high with the total resistance. An Adendum to our Electronics Book needs to have the ESR explaination, since many old people never had that word to ever have been mentioned and they have a College degree in Electronics.

Great video. I wonder why one chip was driven harder than the other. There's no sign of burn in on the other chip. Is that due to one of the failing caps connected to the failed chip, maybe! Whatever has burnt up that chip has taken enough time to brown the pcb up. It wasn't a sudden fail.

@LearnElectronicsRepair

2 жыл бұрын

Could be capacitors - could be a problem with one of the back light flourescent tubes, but the controller is supposed to monitor the tube voltage/current and shut down if there is a problem. The only sure way to tell would be with a CCFL tester but I don't have one, and the parts were inexpensive so I decided to take a chance. There may be a part 2 depending what happens when the parts arrive, and I could try to convert it to LED backlight if there is a bad CCFL tube.

Well done sir nice video.

@LearnElectronicsRepair

2 жыл бұрын

Thanks, glad you enjoyed it.

Heya nice trouble shooting can't wait for part 2

I got lucky, I found your channel. Please do more repair video's

@LearnElectronicsRepair

2 жыл бұрын

@R .Cook Oh for sure I will... I will, BUT I thought publishing 208 videos in less than a year so far was pretty good going to be honest 😆

@RCook-iy4xk

2 жыл бұрын

@@LearnElectronicsRepair I am grateful to you for sharing!

great stuff, could you please tell me the make of the desolder tool you are using

It's better. What did you change top camera? I'm just guesing beacuse I,m not sure :D. And it also sounds better. And wow I just crossed over number of subscribers i was subbscribed around 350 subs and now it is almost 7k. This channel so deserve this grow and even more. My apologies for rusty english. Thank you for sharing your knowledge.

Love the video, keep up the good work ! To answer you question the production quality is better. Since I haven't worked on SMPS, is the idea behind the induced current to keep the Mosfet Gate driver running meant as a protection ?

@LearnElectronicsRepair

2 жыл бұрын

@Trouble Maker Basically yes - this is an extremely common circuit design. So the startup resistor can't supply enough current to keep the PWM IC running, unless the secondary supply kicks in. Any fault that stops the secondary supply working (like the short in this instance) will automatically cause the PSU to shut down - without it having to monitor the exact cause of the fault. This greatly simplifies the circuit, reduces the component count and the cost. Whether the PWM IC will keep on retrying (often causing a 'chirping noise' from the PSU) or just shuts down and stays off until mains power is removed and reapplied, depends on the type of PWM IC.

@trouble_maker023

2 жыл бұрын

@@LearnElectronicsRepair thanks for great explanation ☺️

You made it so much harder on yourself at start by opening it wrong way. @8:45 typical lcd psu : ac-dc conversion in the middle, inverter for backlight on right, 3.3v/5v for display processor and optional audio amplifier (missing on this model) on the left. Capacitors failing due to overheating and just being cheap, low quality capacitors. Things to look out for: as the backlight tubes age, they consume more current and that "stresses" the high voltage transformers and there can be protections kicking in (too much current) or transformers heat up more which accelerates capacitor aging or backlight could fail due to controller measuring too high difference between tubes. Another typical failure is the wires desoldering themselves from solid core wire on the tubes in the corners of the screen. The wires go through thick rubber ends and are soldered to the tube wire, but the solder can break and then you have arc-ing from time to time, which again can damage the inverter circuit A sort of simple fix would be replacing the tubes with led strips and a led driver board (they make them with same pinout as fluorescent inverters)

@LearnElectronicsRepair

2 жыл бұрын

@mariushmedias Thanks for the info. I'm not specially familiar with these monitors, but as you see I understand the basic principles enough to be able to repair it. If replacing the dual mosfet does not fix it I could use it to make a video showing a conversion to LED. Not for the fact it's worth the cost and time but to make an interesting video

Has that resistor at the bottom of the board been running hot? The pink one

What are the short wires with nothing on them on the board.

Much prefer the way you discharged the last capacitor :)

@LearnElectronicsRepair

2 жыл бұрын

Hahahahaha😯😯😯🤣

What would be the resolution in this monitor being it is straight vga. Certainly not as handy today as hdmi. How hard would that be to convert it to hdmi? Or not worth the trouble I suppose unless you are Mr Carlson.

Did you video the fix as I cant find it ?...cheers.

Given the electrolytic capacitors dry out over time, is it ok to use salvaged? Also, given the cost of new ones, would it be worth me just getting a stock of them?

Those 4 caps look bad next to inverter xformers.

@learnelectronicsrepair Hey there....Can't find a comment or follow up vid on this one? Always need to know the final outcome??? TIA

Hello, my 22 screen hp monitor does not have a vertical half screen. 2 470uf 25 v capacitors on the motherboard have exploded, so is there a half screen error or there is a cof fix demi problem. Do you think it will be fixed if I change the capacitor?

@LearnElectronicsRepair

2 жыл бұрын

depending on the design of the monitor, it could have two flat ribbon cable connecting to the Tcon (Timing contol) PCB. If that is the case then often one cable makes a bad connection and you only get half a screen. You can try swapping the two cables if that is the case. I've seen this more often on TVs though. Another common cause is the LCD panel fails and one side is black. There is no harm replacing the faulty caps so give it a go.

@suataydemir9144

2 жыл бұрын

@@LearnElectronicsRepair LCD televisions have 2 plexi connections. This monitor has only one Flex connector.Let's see what happens after I replace the capacitors.I don't understand the cof link. But I will try to check.Thanks for the answer.👏👏👏

did you get the parts?

Ive repaired a lot if tv's and monitors over the years, 95% its the caps thats the issues i normally fit higher voltage caps but the same fu

How the hell did this thing broke I have it for about 10 years now and still working fine

4 caps poped

J'aime bien les vidéos, mais je trouve qu'il parle de trop et les vidéos serait plus intéressante à regarder si il allait vraiment à l'essentiel du dépannage. Parce que parfois on en a vite assez au bout de 5 minutes de visionnage. C'est dommage

@yvesrochet3288

Жыл бұрын

On risque alors de perdre son accent savoureux de Liverpool et son humour. Isn’t ?