Minis Forum HM80 Repair, No Power - LFC
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- เผยแพร่เมื่อ 25 ก.ย. 2023
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The fact those USB-C power leads are allowed to be made is disgraceful.
They're an accident waiting to happen.
I'd rather have a dc barrel connector. Very strong, easy to replace.
19v only USB C connector is insane. Yes most people here know that you should not plug in 19v in your 5v phone but give this to a non technical person and they will without hesitating try to charge their phone with it.
Even though I know it, I don't trust myself to never be absent-minded ever. I think the design choice is irresponsible.
If i have something like this lying around, I'd put a label at the connector. I know some people who will plug in without checking anything and blow their phone.
3:43 Gotta love, that they could not even be bothered to remove the "Center Positive" marking next to the Power Input after changing it from barrel-jack to USB-C.
And if you rotate the case 180 degrees the 19.5 V fake type C fits nicely in the same way into the real type C USB socket. Probably not rated for that voltage. Not for long anyway.
The Paul Daniels power meter... I liked it, not a lot, but I liked it! 🤣
I didn't like your joke a lot... ;)
@@pldaniels haha, are you stalking me after I made the same joke on another video?
Very nice, you are one of the few repair techs that would attempt fixing a mini-computer, the customer should put a red label, saying Minisforum HM80 only on the power supply. I agree with you 100%, if they didn't want to pay for the proper usb C power delivery, they should have used a barrel connector.
Who won't? Just a laptop for desktop
that fake USB-C is shockingly bad! As you say, it shouldn't exist. Nice simple fix, rewarding :)
The mini PC has a normal USB C socket as well as the power input jack. If the cursed power supply is plugged into the normal USB C socket, I would imagine fireworks ensue. This really is an accident waiting to happen.
If you accidentally plug a USB C cable on the front to the USB A connector right next to it, you get a reboot. Done it about 3 times.
That's not what I meant..
"They also function as a poor man's LCR meter. "
Great idea! 😊
Nice to hear you say that some of your recent jobs have been outside of your skill level. Makes me feel better about the dead laptops I have sitting on my workbench that I am struggling with. Thanks for the videos :)
Done watching, thank you very much for the informative repair video. I have learned significantly more troubleshooting & repair lessons in this tutorial video and to your other repair videos as well compared to my ENTIRE 4 YEARS OF COLLEGE EDUCATION. I hope you will soon have a mini-series for Schematic & Boardview-free Voltage/Power Rail Tracing[12V/18-20V Main Voltage Rail, 5V, 3.3V, CPU/GPU Core Voltage Rail, DRAM Voltage Rail, IGPU Voltage Rail, System Agent/Northbridge Voltage Rail, PCH Voltage Rail, BIOS Voltage Rail, Battery Power Rail], Proper method of testing/checking of potentially faulty MOSFETs & ICs/Controller Chips, CPU/GPU/PCH Reballing and BIOS Bin File Editing.
Excellent job and a great video. Please do review some of these mini PCs. You might want to speak to Patrick from the Servethehome channel about the PSUs - I believe they have a collection of assorted mini PCs - but not being proper USB C is shocking. And, as you pointed out, dangerous.
When you do come to review them, be aware that they are very stealable so if you put one on display to learn what your customers think (and I suggest you do), make sure it's properly secured.
I didn't know about this device so I saw it with marked interest. Excellent repair. A sincere congratulations. Thank you very much for sharing. All the best.
I have a similar one, UM700. Tool free opening, top pops off. Motherboard is installed upside down from yours, so SSD, RAM, wifi are accessible from the top. PSU is barrel connector.
Brilliant video and narrative. Thanks 👍
Lovely work Graham, nice to watch you work thru the problem and fix it :)
Cheers! Fantastic repair job. 🤩 Thank you for some educational troubleshooting.
great video, nice explanation, good work
I agree with you and the other comments. This power connector is a deadly sin. PLEASE Minis Forum just put a DC barrel jack on that or create a proper USB-C loading circuit.
A tip - when testing SMDs get a bit of sellotape stick the SMD to the tape then connect to the test pads - You will never tiddlywinks ping an SMD again. LOL
great vid, thank you for the knowledge here. skills!
Nice fix Graham, just as a side note, you can get around your capture device's reluctance to capture drm content by using a simple 6quid ebay hdmi splitter. The cheap ones work by faking a drm compliant monitor, then passing out the decrypted video to the 2 outputs. Connect your preview monitor to the 2nd output, rather than the thru port on the capture device.
Yea, I have a splitter, I just hate the extra spaghetti that it adds to the setup😔
Great video as usual!
Love these kinds of fixes, you get to look like a wizard and also save a pretty good computer from going to the dump. Kudos sir, love to see some easy ones! Also, not so easy for people that do not know how to do component level repair.
Appreciated! I can't help but compare myself to better techs and see the things I can already do as 'easy' compared to what I want to be able to do as 'the legit stuff'.
@@Adamant_IT I do that as well, that is just natural for how the brain works. Just know that you are doing things far from a beginner level and it is great to see the progression. Keep it up, you are someone I would love to work with and learn from.
Thank you for the video. I wondered what is inside the little HM80 guys.
Nice work!
It's great seeing you using more flux now. Thanks for the video brother
Great job 👍
Awesome fix
Nice work. I fixed an RX 560 that was a visual damage repair. The M-Tester is fantastic and helped me identify what the component was. With some guidance of folks on your discord as well.
I wonder how you make this complicated fix looks like easy thing, you're amazing
Done that, been there, plugged one into my phone. I just assumed at the tiime all c's where 5 volt. Someone changed that while I was sleeping. Lesson learned - Chinese do not understand standards. That should be a barrel detector
What is the purpose in having an USB-C connector if it is not PD compatible?
Just product designers being cheap... wanting to new connector without the expensive of a PD control circuit.
It's annoying though, because a non-compliant Type-C port is worse than useless... you can't use a PD charger on it, so there's no advantage to it being Type-C, and the power supply it comes with is a hazard because it could damage PD devices that don't have specific protection against a faulty charger.
Like he said, probably just to look modern.
WHOA.... that dead short was asking for nearly 6.6A at .04V... according to the min/max numbers that appeared when you plugged it in.
red line is voltage, white is amps (after edit once I've finished watching this upload)
Have you considered buying a pair of hot tweezers for removing and replacing tiny components rather than using a hot air station ?
I tend to favour tools that can do many things, rather than one specific trick, but I have to admit, a pair of hot tweezers would get a lot of use. Have been thinking about them lately as well 👌
It's pretty interesting that it seens like the capacitors right after the input protection circuit in those mini PCs tend to short circuit. I've had to fix a handful of m93 from lenovo and when the problem was shorted input most of the time was one of the caps right after the input MOSFET. Most likely coincidence.
Great video as always. Cheers!
Mmm. I'm not sure if those specific caps take a beating because they're right on the input, before any kind of input protection (DC mosfets / in-rush inductors) or because being at the edge of the board, next to the connectors, makes them vulnerable to board flex.
The input caps will see large voltage spikes, due to ringing when the supply is plugged and unplugged. In this case probably 40-50V. But the caps themselves can easily handle that. I'm thinking its board flex as you said, as they are right beside the screw hole.
USB C PD uses various voltages: 5V, 9V, 12 V.... but not 19.5 V straight through the adapter... Goddamnit, I can already see the havoc that would wreck on capacitors on a board inside your phone.
Also:
MINIS uses Dive! It's very effective!
As a vintage computer collector, i'm honestly shocked to see how much regression we've made with USB-C - this is a throwback to the days of 9 pin and DIN interfaces that are physically compatible with each other, but not electrically compatible... I guess manufacturers who can't remember the past are condemned to repeat it, lol
There is probably a lot of truth in that. People who design such concepts nowadays are young and do not know the hassle we've gone through in the past and are bound to repeat our errors.
@@MarkusHobelsberger it's practically inexcusable hahah I can't believe some of the oversights made with computers & their design these days.
I noticed the laptop i'd purchased recently had shipped with a charger that had a very small, thin plug; so small in fact that it would fit perfectly inside of the 3.5mm audio jack on the machine. I was curious to see what would happen, so I plugged the charger into the audio jack-
Kidding. I looked online to see if anyone had accidentally done this, and sure enough, there's quite a few people online asking for help or repair advice after mistakenly plugging the charger into the wrong socket.
This is the kind of shit that could potentially end with a class action lawsuit in my eyes, hahah.
Nice work, G.Lord ! The methodical way to the solution is always a nice treat in this longer videos...Keep it up.
very good job
any links to buy the USBC tester/display?
You should have a look at getting the thermally active powder all you have to do is just sprinkle it over the board and then plug the power in and you will see it melting where it's shorting
Another awesome job Graham, you rock. I love these repair vids, thank you dude.
Great video, do you have a link to the usb power meter you used
Developed by @pldaniels , there might be a run of these go on sale at pldaniels.com in the future, not sure what the time scale is. They'll cost more than the usual cheap ones, but software monitoring with hysteresis graphs is very useful for seeing oscillations and pulses.
I would interested in seeing more teardowns of minipcs. Increasingly something that walks in off the street.
Buen trabajo.
Where did you get that hoodie? It reminds me of the Commodore 64 screen colors. 🙂
That power supply is extremely stupid and dangerous. What the heck!
Is there a grey area in the EU law that forced to use usbc?
Naa that only applies to mobile devices. This is just a bad flex. Barrel jacks look old fashioned, people want Type-C. But you either do that properly, or you don't do it at all.
nice one
Great video but worth mentioning that the 10uF capacitors will be polarised and so it is essential to solder them in the correct way round. There should be markings on the capacitor to show either the + or - end and it should be easy to identify the -ve and on the board as this will be connected to ground. The 100nF capacitor will not be polarised and so can be soldered in any way round.
These are both unpolarised ceramic caps. Polarised Tantalum caps have distinctive black plastic casings.
@@Adamant_IT ah ok, that makes sense as to why you didn't mention polarity. As an old timer, I wasn't aware that you could get unpolarized 10uF capacitors so small!
Yea, on the limits for this foot-print, and prone to failure as well, so make of that what you will 😅
cool video Graham
Nice not to have to go down rabbit hole for a change :)
Do you happen to know of any UK soldering skill workshops for in person tuition?
Those caps should not have failed, I’d scope the power supply and 5v rail for excessive ripple
I wonder, with that UCB-C powerjack and no protocol sending over: would a normal/proper USB-C adapter that can deliver 19V even work?
If not, what's the point?
Yea a PD charger won't talk to a device like this, because there's no chip in the computer to say "Hello, please give me 20v", so the PD charger will sit at 0v or maybe 5v in some cases. They should've just put a barrel jack on this PC.
@@Adamant_IT So we have a connector (USB-C) on the computer that isn't compatible with other USB-C power adapters, a USB-C power adapter that isn't USB-C and can blow up other USB-C devices and it's a connector that is more expensive, arguably weaker and more difficult to replace than normal barrel jack connectors?
You don't see that often, a triple fail! 😁😂
Great video BTW and great for pointing this out 👍
I hope they'll end this madness asap (either go with the barrel jack or do proper USB-C intergration, IDK)
@@Adamant_IT It is strange because I have a Minisforum UM790Pro and that has a barrel jack for power (and also PD in via a proper USB-C port). Maybe they have learned their lesson. Personally I would have thought the barrel jack would have been cheaper and easier.
The S23 and its Ultra variant (the model of S23 I have) can utilise one of these.
However, that particular power brick on the Australian market is limited to a max output of 12v.
The reason behind this is to ensure compatibility with devices with USB C connecters in general.
As our devices get more powerful, they'll need more power, therefore more voltage to charge, but they can also be adapted for anything else.
We don't have the economy to support more voltage hungry devides, except car and aircraft batteries, which is bulls**t at best.
neat little repair job, also a neat little system too, i wonder if that will replace my PC that i just use for web browsing and watching youtube. Be great if it is! because i can just toss windows 11 on.
@@peterc8622 cheers pal! its been years since i have built a PC in general, the last daily work horse is pushing 7 years now, which was built for windows 10, all i have had to do, is change the PSU and Graphics card, due to me changing the monitor, for a newer unit. That was close to 5 years ago, that's about as far as i have gone upgrade wise. Id just change the monitor for a HDMI unit, for this little system. How often do people use DVD drives in systems etc? I have only used it twice since.
I confess, i am a pervert😆 watching Adamant vids is like christmas break for me. Awesome content man. Please show more mini pcs. I am close to buy one, the Minis ones are often on sale.
Lenovo is using yellow usb connector on power supply for units that uses micro usb at 9v ( i have a yaga book that uses mifro usb at 9v ) and i saw also dell using microusb at 9v
What is the black box for? just snip it off and shove the USB C connector cable into the outlet.
Most universal serious bang-o-puff-bus ever.
Once I swap my older Intel G5400 Coffee Lake to a new Intel i7 what else needs to be done?
Wow dangerous adapter
hey @Admant IT, do you have any courses to recommend for me where I can study in-depth about circuit board repair?
Not that I know of. A lot of it comes down to watching a lot of board repair videos on TH-cam, and having access to stuff to practise on.
Nice
Now, Why you should have a fuse connected to ground?
Hi, can you tell me please, what type of cooling fan it is? I need to replace it in my HM80, because it is out of balance. Tanks
You're fixing one of those _already?_ And, to think I almost bought one...
Hi, I am trying to identify a component on the power in circuit of my Intel Nuc. The component is marked with 4305 and RQ | 1W , has 8 pins and a dot in one corner. I think it is a mosfet but unsure of the type or rating. Any help would be gratefully accepted.
19:20, So it's not just me who loses parts to crazy physics.
Excelente.
Can you do a video on how to program a BGA ITE super IO chip..! Thanks
Ah I'm not as far as doing Super IO / EC chips yet, so can't advise there!
That power adapter can charge my Nintendo switch powerbank since it can take up to 20v to charge it!
👏👏👏👏👏
Outside your skill range? It must be difficult indeed.
Hi there.
I have a general question regarding my Dads PC motherboard that won’t turn on.
Just some quick background. I have been very interested in fixing electronic equipment since a very early age and have been absolutely glued to your videos that have enabled me to fix a numerous amount of items and have been doing so for many years now.
I was wondering if you or anyone else reading this, could be so kind as to point me in the right direction to solving this motherboard issue. I have numerous fault finding equipment and am very adept with soldering (especially SMT soldering). If anyone can help me I would be very grateful. Many thanks. Ash
Some lenovo laptops are coming with usb power connnectors.
They at least are proper PD units ( many machines are coming with them ) and it's a nice thing to see now because it does simplify the workbench... but my goodness, this one should have just stayed as a barrel jack :(
@26:00 could you have just soldered the earth side of the capacitor to the circular ground plane to the side, instead of scratching the motherboard
Probably, but you'd need to be aware of how the mobo fits back into the chassis, in case the chassis frame knocks the cap off again.
SUPER
It didn't last very long, did it?
Only an easy fix if you have a lot of experience but it seemed to cheer you up what with the "invalid traffic" problem yours and similar channels have.
Is it helpfull to " leave a comment for the algorithm or could that make the "invalid traffic" problem worse?
Cheers! I'd say engagement is always helpful. I'm not sure if anyone really knows the details of the invalid traffic issue we're all facing, most of the coverage I've seen of it is just people saying 'viewership / revenue has collapsed' without really delving into what can actually be done about it. This is just another symptom of the problem that is algorithmically-driven-content. Content creators need to just keep doing their thing, and the audience needs to use the subscriptions page to check for new content, instead of trusting the home page to tell them when a new video is out.
How can I improve the performance of windows 11 on an 4 year old laptop
Depends on the laptop, 4-years old should definitely be viable, but check the specs on it - In my opinion, the minimum requirements for a good user experience on a computer these days is: 4 core / 8 thread CPU, 8GB of RAM, and a known-brand SSD. If the system is less than that, it's going to feel laggy. There's a few tweaks you can do to make a slow computer feel a bit more responsive, but getting to that minimum spec should be the first steps I think.
Same issue with another Miniforum computer after 2.5 years of mild use. They do not respond to support emails. My recommendation would be to avoid this brand.
yea this is dumb. either support PD or use a barrel jack. at least with a barrel jack people won't plug it directly into their phone because barrel jacks are kinda conditioned in the conscience to not be universal and to be extra careful
it doesn't cost them that much to just support PD. it's simply a penny pinching design. I would be fine if the PSU was PD and only supported 5v and 19v, because at least then it wouldn't fry a phone. and even if the PC would just not boot without 20v, that's fine too, as long as it supports PD.
the scale is so hard to tell under the microscope most of the time. when you went to test the 3 components you took off, I thought you were testing the small 1 first after seeing how small it was... nope
HM80 are cantankerous beasts. Love it until... you give it more to do, then the video just cuts out. You have to press the power button to recover/reboot. I use drivereasy and know I have latest drivers. It feels like a BIOS issue ?
Why did you not take off the chipped capacitor then test the board for a short. Did you need more video content? Hope you didn't charge the customer extra for that.
When diagnosing, you should look over the whole board first to get the big picture. A cracked capacitor would be the least of my concern if I found a crater in the board further down the line. But as we went further in, there was no real sign of problems, so that's the point where I moved back to the capacitors.
It's also about teaching people to think about following power rails through a board, this time the capacitor was right at the input, but if it wasn't that one, where would we look next...
I do not like that adapter, that thing should not exist!
Not a great showing for Minisforum. Not even 2 years old and already broken + the 19v thing
wow bro. you really should learn a bit more about how electronics deal with electricity. lol
You multimeter is a piece of garbage…It shows 0ohms before anything else
Capacitors in-circuit. An expensive meter might do it slightly faster, or blank the screen for a second, but you can't escape the moment of instability when you probe a main power rail with a hundred microfarads of capacitance on it.
I'm happy to wait a few seconds for a reading, rather than fork out $$$ for an expensive meter that'll ultimately tell me the same reading. If you're doing really high stuff and you need 5-digit resolution, then you get an expensive meter, I only need accuracy to the correct order of magnitude to check if a rail is in the right ballpark.
@@Adamant_IT haha…Do you sell it? I want to smash it with a hammer 😂
Be my guest, it's a great starter meter 😉
(Associate link) amzn.to/45fIrAQ
It isn't a guy, it is an inanimate object, the Americanisation of your grammar is annoying to listen to. Otherwise good.