DELL U2515H 1440p Monitor NOT WORKING - Can I FIX it?
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- Опубліковано 17 гру 2021
- Here we have a DELL monitor which doesn't turn on. It was purchased cheaply on eBay. It looks in good condition but can it be brought back to life? Let's find out.
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Remember that this is just for entertainment and I am not an expert in these repairs. The processes in the video may not be the best way, the correct way or the safest way to fix these things. I do love fault finding and trying to fix broken things, so I hope that comes across in this 'Trying to FIX' series. Many thanks, Vince. - Навчання та стиль
Hi Vince, a few things. To find a mosfet online, wherever you see an "N" in its number, there will generally be two numbers preceding it and two numbers following it (sometimes there will be other letters like M or L as well). In this case, it is 15N15. These two numbers generally are supposed to represent Drain source voltage, and drain current, and the letter N represents N-channel. Some manufacturers can make it confusing though, but you can use this as a guideline. There are other naming conventions as well for mosfets, like 2SK, IRF, etc.
The mosfet that you chose - IRF510 - will work, but not sure for how long. It is drastically underrated, the IRF510 is 5A drain current vs the original 15N15 is 50A. The voltage is underrated as well, and the capacitances are wildly different (in a switching power supply, capacitances of switching FETs are important) - Ciss (input capacitance) of the IRF510 is 180pF vs 3560pF of the 15N15, gate charge is 8nC vs 63nC, etc. This can affect duty cycle and "dead time" in switching transitions, rise times, ringing, and even create unwanted resonances in the circuit. When you start using more than one switching FET, such as in a push-pull circuit or a half bridge, these capacitances become even more critical.
In your little box of FETs there, the IRF640 would be a better choice, as many of its specs are closer to the original, though capacitance are still somewhat off and it is only 15A rated.
Also, transistors in this style are a TO-220 package. If you are looking for a transistor with an insulated tab instead of the metal one, this would be TO-220F or TO-220FP.
Brilliant info Dacke, really useful to me and everyone else reading it. Thanks for taking the time to post it 👍👍👍👍
The 15N15 has 15A current, not 50A, so his alternative isn't that much underrated, especially considering that the monitor surely won't take more than 100W of continuous DC power for the panel and control board. Of course it's better to get the right spec'd one eventually for long-term reliability. The capacitance also shouldn't matter much, since the switching frequencies are low (surely below 1MHz) and the switching circuit is self-regulating.
It's interesting though why his first 2 choices didn't work - I guess because the voltage rating was too low. That would imply a really high voltage on the "primary" side (around 100V?) and a very short duty cycle of the MOSFET.
@@RealNovgorod The datasheet actually says 50A, I thought it was 15A as well - Link removed, part number is MTE015N15RFP (cant post links in replies I guess)
Regardless, 50A on a switcher is somewhat overkill for what looks like a flyback design, I agree with you. It could be a typo or maybe that part was just all they could easily get from their suppliers.
Parasitic capacitances are always important in SMPS designs, and switching frequencies are almost always low (usually 500-700kHz or less). If they are off somewhat in a lower power design like this, it *shouldn't* matter, but they were off about as much as they could be. This will affect the drive signal, the duty cycle, time spent in the linear region, and heat and power loss. The feedback network can compensate for this, but only so much. Sure it will work, but I don't know for how long. And as I stated, if there is more than one switcher, such as a push-pull or chopper design, Coss can affect how long the fet stays turned on/off. If one fet has not turned off before the other has turned on, you have a direct short and catastrophic failure (both fets are on). This is actually a common mistake people have made when subbing fet replacements and cant figure out why it keeps failing in less than a few minutes after power up. All the specs match, but they neglected to check the capacitance and rise/fall time values. The only reason I mention capacitance in this instance is because it is off between those two fets by 20(!) orders of magnitude, and that's quite significant.
@@Sloxx701 That's all true, but in this case it's just a single MOSFET, so at most it will reduce efficiency a bit and maybe add some more ripple. Regarding the 15N15 specs, I just looked at the first datasheet that showed up in the search (part number is exactly 15N15 from ISC) and it's rated for 150V, 15A continuous. But it's also a TO-3 package, not TO-220, and probably the manufacturers aren't too consistent with their part numbers anyway.
@@RealNovgorod Strange I didn't see that datasheet, but I ended up at a cystech MTE015N15RFP and its a 50A TO-220FP part. But yes with 15N15 it should be 15A, which I think is fine. I think he will be fine with the IRF640 for now, however I would eventually replace it with a closer match or an upgraded part if he plans to sell the monitor to someone.
The first two choices he tried I didn't look at very closely, but now I'm curious so I'll watch it again. (I skimmed through some parts)
Vince is so honest. I think it’s VERY important to recognize when we don’t know how to fix things BUT, what he does is even more important cause he tries again and again even if it’s just for learning. Congratulations for videos like these ones when we all end up learning something
This has got to be one of my favorites! A lesson for being methodical and just trying stuff.
Nice one Wesley, thank you 👍
This video saved me $200 and kept one more monitor from becoming e-waste. My monitor had a different problem (blown fuse) but the diagnostic procedures in this video taught me what to check. Thank you.
Hi Vince there is a guy called Sorin who works in a repair shop in London. He runs a UA-cam channel called electronic repair school. He has numerous videos that take you through diagnosing SMPS boards. I'm about the same level as yourself on electronic fault finding and Sorin's videos have been a massive help in teaching me to understand how a SMPS works and how to fault find. He also uses very basic tools and a multimeter. Seriously well worth watching. Keep up the good work Vince I really look forward to your videos.. Cheers Baz
Sorin is fantastic.
He's very entertaining!
Diodegonewild specializes in power supplies.
Learn Electronics Repair as excellent channel as well.
Diodegonewild is the master of power supply
Sorin from electronic repair school il also good and funny
I confess to cheating on a similar problem once, with a TV. I noticed that the 12v (on that model) was missing, so I just bought an off the shelf 12v PSU unit and built it in instead! Well done, Vince.
this is something i was gonna suggest, a 19v laptop power brick probably would have done the job and you wouldnt have the problem of trying to secure and fit it within, just fit a compatible dc barrel jack socket somewhere and have the psu external instead
@@oldskoolhead0 I have a few of these with known power supply issues and if any of mine fail this is exactly what ill be doing, I have a bunch of 19v laptop power supplies laying around that will work.
One thing I noticed that you are cleaning the device with much care 👍,I can feel how much passionate you are. That shows you are a very good technician.Keep up the good work 👍👍👍
G'day Vince, you persistence is something to be admired, many a people would have given up. Well done!
Very well done Vince, you got me glued to this video. Well done for your persistence and fortitude. ATB
Brilliant repair Vince.
So glad you were able to fix it even after eBay seller had it apart already.
Absolutely brilliant fix. I'm learning from you, keep these kinds of fixes up! :)
Highly impressed with this sir. Your presentation is excellent as is your narrative. Very glad that I came across your channel. I will be back for more!
Not many better feelings in the world than you fix something in this way yourself! Good work
Greetings. The absolutely best feeling. It is quite exhilarating to restore life to something that was dead. The joy is indescribable.
Wow I just started watching your channel and I started with the older videos, you've really gotten so much better
Great to see someone willing to put the work in and fix something. What a great example of the ridiculous state we are in that things we buy if they break down are just throw away and replaced. A friend of mine works at a Dyson returns place in Gloucester and he tells me virtually all of Dyson returns are scrapped - very little is re-used, and some of the returns are from stockists so have never even been unboxed but because they have not sold are outdated. Hundreds of thousands retail price of goods scrapped. It is really disgusting.
They do that, so that they dont lower the price of the newer dysons. Even if they allowed the older unused items to be sold cheaply , it would then reflect on the price of the items they are trying to sell. Same as why burberry and all other high cost item manufacturers do when they get old stock, its better if they destroy it.
The UltraSharp monitors are some of Dell's good ones! I have the 27" U2715H and it is awesome! The little stick-on covers on the lower edge are intended to cover the clip points for the Dell SoundBar.
This was a nice one.
Well done 👏.
You are inspiring me to go and start whit simple thing to repair.
Like controllers and stuff.
I always sucked in electronics,so i watch as much as i can on channels like yours.
Thank you
Oh, we have thousands of these monitors at my job. I work in our IT department as our Mac Administrator. Usually we toss them because people crack the LCD panel, I don’t recall us ever having one with a failed power supply.
Really Nice video Vince
Your videos inspires me to keep going on my small channel.
I can still remember when you didn't even know what a power rail was but you never gave up .
Great deduction on the mosfet value. switch mode power supplies are a pain to work on!
keep up the great work .👍
As always, love to hear that Yes when fix is going well. Nice job 👍 And a happy new year 🎄
Really great video, step by step diagnose and finding fault + solving problem, wish you all the best and waiting for new videos!
Well done Vince,you put a lot of work in to that ! 😊
Nice fix Vince!
By the way; I have used similar models at my office for many years, and my primary monitor (Dell 24") is now 10+ years old. If you want audio on the screen you can check for original soundbars for your particular model, as several of Dell's models support this. A quick search indicates that a soundbar with the designation AC511 should be correct for your monitor. The blanking panels that you removed from the bottom is there to hide the mounting brackets for the soundbar.
I have that soundbar for my dell u2515h und it is good enough for everything. did not use it much lately, because of my new headphones i can wear all day long, but still works and sounds good to me. (of course it is not a 100€ speakerset, but it does the job)
I really liked that you used lofi/chill music while cleaning the stand and back. fits perfectly.
Hey vince the bottom covers you popped out are actually for the sound bar! Nice fault finding BTW it´s allways nice to see your videos!
Amazing ...always great when you make it work in the end. Keep them coming. cheers
Hi Vine, Happy New Year. I thoughrouly enjoyed your video most enlightening. Will certainly be looking forward to your next one.Regards, Brian
Great video! You would not believe how many monitors I have junked with similar symptoms. Not anymore. I have some experience with electronics so I’m at least going to do some trouble shooting inside before trashing another one. Save the planet for the grandkids. Thanks for sharing!
Nice work Vince - I am watching you on dual Dell U2412M monitors with the same stand features - these are great/fantastic monitors for folks who don't need 4K!
Well done! I really enjoyed this one! Merry Christmas and a Happy New Year to you and yours as well! Looking forward to your new videos in the coming new year! 👍👍
nice to see a video in the week-end for us to be relaxed
Greetings. Thanks for sharing and thanks to the educational and informative responses provided by the commentators respecting mosfets specifications and operations. Thanks.
Superb fault finding on this one, Vince. I hope it carries on working for many more months to come! I wonder whether you could get a nylon screw to secure the mosfet? Not sure if that would work, but the cable tie option is usually a good one! 👍
Good idea with the nylon screw. Hopefully I will be able to buy the correct MOSFET when this goes live. Cheers Steve 👍
While a nylon screw could mechanically work, as the mosfet heats up, it can become brittle and give in. The proper solution here is to get an insulated mosfet and screw in the metal screw IMHO....
@@ErrorMessageNotFound Ehh...true, true :))) I didn't think that one really through :D Thanks!!
@@Mymatevince Look for "to-220 insulator kit", that would solve the problem with metal mosfets. Oh, and that heatsink isn't painted, it's anodized aluminum. Great work anyways, keeping it safe. Happy holidays!
Really enjoyed this one Vince. I Had an Ultrasharp years ago which I used for photo editing as it was colour calibrated. Best monitor I ever had. It broke in a similar fashion to this and I've never found one quite as good for colour accuracy.... Wish I'd tried to fix it now, lol.
Got a 24in 1080p samsung curved its okay not higher but colour accuracy is really good but calibrated with colour munki to gpu
Excellent Troubleshooting skills.. Very easy to the beginners to learn a step by step procedure to fix the Power supply issues.
Nice one mate another fun adventure.
If you look back through this vid you'll see the backlights came on when you upped the amps which was a good sign. Well done!
You did a good job. "I also have the same model LED that does not light up." It helped me find the fault. thank you
Brilliant fix Vince! Well done mate!
Brilliant. Watched a number of DIYs, most have no talking just music. Learnt a lot about this repair. Shall be testing the MOSFETs on my Dell U2412M…
My ex GF had lent me an old Alienware monitor that quit when I was using it. Surely nothing I did caused it to quit, it was fairly old, but I felt bad none the less. Same thing, just dead, no power light, nothing. I did take it apart and check for any fuses, but didn't see any obvious ones, but I didn't check anything on the power supply. You just gave me some really good things to ck, thanks so much!! Great video!!
Hi Vince. Old history now I guess, but a more permanent solution for the conductive tab transistor is to use a mica washer which come in all shapes and sizes to suit - beware they are VERY delicate! + & nylon bolt (or through hole insulator if using the original bolt) with lots of lovely thermal paste
Mosfet's are like my number one check on a power supply if caps aren't buldging. Great video vince!
now then a shock wouldn't be that exciting it would certainly give people a buzz great video as always
Cool. You did find it! Really cool, this monitor is from the same series mine is from. I still own a UP2715K (5K). On mine the stand is metal as well. Really nice monitors! Great picture. I think you did really well!
You can use a plastic screw insert and clear fiber insulator to secure the mosfet to heat sink. This is commonly used in many ground sensitivity components 😊
Wow what a save!! Excellent work sir!
Watching on the same Dell, even older. I don't shut it down ever and it works well. Thanks for the clue if I ever need it.
Nice fix vince, really enjoyed this one 👍👍👍
You are best mate you really have cheered me up over the year gape you and your family have a wonderful Christmas 😎👍
Let’s hope so. Keep up the good work fella and stay safe.
Merry Christmas to the MMVM.
Nice job Vince. As StezStix Fix says that is a 15N15. I think the case style is called a TO220-3-313. What you need with what you have there is a smaller diameter bolt, a mica or other isolation pad and a little plastic washer that has a flange that goes inside the hole to keep the screw from touching the metal. I think it is called a TO220 mounting kit. What you need (I think) is a IPA105N15N3 G which is a 150V 37 amp Mosfet about $5 american from DIgikey. I think what you put in is 9.7A at 100V. I don't know how long that will last, not because of the current draw but the voltage.
Keep up the good work. (I did subscribe).
Looks like the original MOSFET is a Cystech MTE015N15RFP. If you look at the last page of the datasheet, the markings are the same and the last line 6M03 would be the date code (6 = 2016, M = December, maybe, this seems a little too close to the Jan 2017 date on the monitor though!). Doesn't seem available to buy in small quantities but maybe that will help in finding a suitable alternative if you ever need one!? Great fix anyway!
Thank you ekens63, nice one👍
Still have three of those Ultrasharp U2515Hs in a triple monitor setup today. Been using them since 2015 and they're still going strong.
Great to know about that MOSFET as a potential weakness, hope I never need to replace the ones in mine, but if they were to fail, at least I'd have some place to start with repairing them :)
I love when Vince goes "Hi I'm Vince from My Mate Vince", like we didn't know what were watching 😂
awesome fix Vince :) great fault finding :)
Thanks Vince, this really inspires me.
Have the same monitor and it has served me well. First on home PC, now I use it instead of the work issued one. IIRC there is a headphone jack and the sound is passed over the HDMI so you can attach a pair of speakers
Massive thumbs up here, nice repair and kudos for fighting the disposable attitude of consumers and manufacturers.
Well done Vince! Keep up the great work :)
That's a great fix nice monitor. Have a happy Xmas and new year vince
You channel cost me money, whenever i watch one of your videos i end up buying a project. Recently fixed 7 elgato capture cards and a few ps5 controllers!
🤣🤣🤣👍
I really enjoyed that video. It was worth the insane amount of advertisement interruptions. I have a similar monitor that unexpectedly stopped working also. Guess what will be this weekend project😊
Another great fix Vince, we’ll done!
That's a pretty good display for general usage, nicely done Vince!
Thanks Garth 👍
Well done,,great content from trying up to successful repair i learned to look over those mosfet( took it into consideration)....thanks for this content
Excellent repair and power supply troubleshooting. 👍
Amazing work Vincent. I had a request for your next videos. Could you recap the steps you have done to find the issue before the video ends? It will be helpfull for people like me to understand better what have you done. Thanks
Love the troubleshooting and fix it videos. Learning a bit from you, thanks. Just a thought, you could use a Kill-A-Watt for the first test. If there's no power then you know there won't be a shock-risk (I think).
It always amazes me your so called "not-professional" ability!!!! You are super!!!! Well Done🤩🤩🤩🤩
That's just brilliant, Vince.
Vince you can get T0-220 insulating kits for those transistors. They are cheap and adding a little thermal paste to the mica on both sides transfers the heat without conducting.
Silicone ones available too.
I love how you sometimes falls ass backwards into beeing a genious, and don't pretend anything else. Superb channel.
🤣👍Thanks Helge
4:50 I don't think those clips were meant to disassemble it, but it's meant for a optional speaker bar you can mount underneath the monitor.
Smashed it Vince well done!
Thanks so much 👍👍👍
Awesome job Detective Vince
Hahaha, nice one Pawn 👍👍
Great fix video Vince. Looks quite an expensive monitor too. 👍
Hi Vince!! I have always enjoyed your videos from an amateur point of view. Because I love technology but I wouldn’t consider myself anywhere near professional even though I’ve pulled a few tech devices and computers apart.
the sneezing and the broken glass effect caught me off guard.... that was a nice touch. xD
loved the sneezing and breaking glass effect LOL
Awesome fix there, you make it look easy! I’m still struggling trying to get this new tangled lead-free solder to stick 🤣
Another great save Vince and one less monitor going into the bin. Merry Crimbo!
Congrats on your fix ! This is decent mid-range 2K 60Hz monitor from 2017-2018. Not a bad score. Looks like the panel is made by LG. Their panels seem to last forever, I have a couple monitors from 2000s still working perfectly to this day.
That single-rail 20V PSU is a bit strange, monitor mainboards do need more than one voltage rail and there's no voltage conversion circuitry on the PSU itself. Most likely the mainboard was designed so that it could run on external 19V PSU as well as internal one. In case if you ever need to replace/fix the PSU again, It should't be too hard to convert this monitor to run on external power.
Right on the money. An old laptop power brick could be whacked in for sure.
WELL DONE good job been fix days. been working now look they wow
These videos are like therapy to me lol
I've had a few Dell Products. What you showed when you first opened it up is exactly how I've been greeted with a mint, never opened Dell. They may be considered a quality brand but their parts and the way their put together are super shabby.
this is inspirational, seriously thank you!
I had the exact same issue with an LG TV PSU, I found a faulty Mosfet with are three pins shorting also a blown fuse, I found a replacement Mosfet and fuse and installed it then it came alive. It's the best feeling when you solve a PSU issue
you are genius
I love what you do
keep it up
Watching this on a Dell u2410 with faulty power (randomly turns off/on about once or twice a day) thx for the vid!
I was willing you to use the 100V Mosfet and you started with a tiny one. Very enjoyable to watch, apart from the bit where I thought you got a shock
I kinda knew the MOSFET would fail due to it being underrated as they would cut corners on component causing it to fail on purpose. That is handy to know about the cold side of the board. It quite easy to know that you can test the MOSFET in circuit and it would show the same short on all three legs that what I normally do for testing.
There's another thing about the internal PSU you can use them to drive LEDs lights or strips with a adjustable DC to DC board
I have exactly the same monitor (I'm watching this on it now!) - well worth fixing. I love mine. IIRC the Xbox Series S|X and one X will output at 1440p / 2K
We’ve got these at work. Smaller dell version but with the internal power supply and same controls/lights. If the mains lead works it’s way loose slightly from moving it about it will arc badly. Need to power down at the plug socket to reseat it again otherwise you get arcing noises and sparks when trying to push it back in. Not sure if that could blow a component. Feel that’s a bit of a design fault. The fit could be better. Only takes a few people to move it on the desk a bit and it’s come out. I much prefer external PSU as a result which seems to stay in well and it’s low voltage at the monitor end. Great fix. Lovely monitor. Impressive way of testing the mosfet and fixing it. Looks to be stable.
Thanks Paul, I have the same issue with the cable on the PS4 Pro, so loose and has been from when it was new. It doesn't spark but it doesn't inspire confidence either 👍👍👍
@@Mymatevince arcing is not good for sensitive electronics. Might be worth seeing if you can use a different cable if a different one fits more smugly. Another risk will be accidentally powering down in the middle of use which is not good for ssd or hard drive. If you never move it however it’s probably not such an issue.
Good job on the successful repair... Also check out a new Probe Master set... They are only $20 usd. They are a joy to use... Voltage regulators usually have an "L" in the pn (LM7805), Mosfets have volts N amps in pn (IXFT60N20), Rectifiers have some sort of diode marking.. Yours looked to be 15N15R... or 150v / 15a
Loved this one! Well done
I have been watching your videos for 5 years remember me please
I have one of those component testers. They are invaluable. Anyone who works on electronics needs one of those. Cheap as chips on ebay. Nice fault finding on that monitor. Get some TO220 insulation kits and it will be 100%.
Nice work. For your information, you can connect these monitors in chain via DP in and out, you can have up to three monitors, even with different resolution! :-)
What an amazing fix and video Vince. Again another device which dies of one little cheap component. We really need the right to repair to save devices like this.
There are clips available to clamp the MosFet at the casing not the metal part - but I think this will last as you did. These switching MosFets usualy don't get very hot (if the design is ok)