USING A ASUS REPAIR GUIDE TO REPAIR A MOTHERBOARD | ASUS PRIME B450 MOTHERBOARD REPAIR
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- เผยแพร่เมื่อ 27 ต.ค. 2024
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pretty nice diagnosis and coming up with that little circuit board to fix the problem.
I enjoy watching your videos with great interest. Thank you for that. I ask if you could also provide a source for the low meld solder. I come from Germany and I find it really difficult to get it at a reasonable price.
I am also from germany and i was only able to get it second hand, because leaded solder is banned in germany for comercial use, so basicly no one has it anymore.
Need a pal from a non-banned spot to send you some?
@@MainboardMedic Danke für die Antwort. Jetzt weiß ich wenigstens warum hier an das Zeug nicht ranzukommen ist. Freue mich schon auf die nächsten Videos.
Had similar issue with a Ryzen CPU I fixed. The pin was not only broken, but the entire pad was gone. Finally I was able to find the trace deeper in the PCB, soldered the pin and reinforced it with some soldermask. I noticed that depending on the pressure from the cooler, the CPU sometimes didn't work. So I sold it to someone as a bundle, with a good motherboard and cooler already installed. Everything worked for me. I sent it to the buyer...and of course it wasn't working. But I explained the problem to him, and he installed his cooler with the right amount of pressure. And now it works, and he is happy because I sold it really cheap, more or less the price od the CPU alone.
@@MyElectronicsRepairAdventure I actually also have a Ryzen CPU where a pad is missing. Did you just dremeled the place until you could solder to it?
hello compliments for the videos, question.. have you tried replacing the resistor? even if it measures well sometimes under voltage they go out of value. thanks
Jep tried that without any luck!
Thanks for this nicely done video
Hi, thank you for your excellent video's, what is the software you use for the board layout please. Bob. UK
Hey thanks, its called Boardviewer!
@@MainboardMedic Hi, thank you for your reply, I have downloaded it but there are no board files? Where do I get them please. Bob
@@stoptheirlies Hey there you will need to look into some discords or forums for them! Expecially the discords work well! LER discord or electronic repair school discord!
@@MainboardMedic Thank you
Same issue on Asus Prime A320-M K. IT8655E. No powergood, mb starts after injection volatage.
When removing the broken MOSFET I would be tempted to clip the leads so that only the tab at the back is holding it in place.
How to find a datasheet of the motherboard desktop any idea broh?
I always google the Modell and then type Boardview after that. Badcaps has some and some Discords like from electronic repair school
Very strange behavior of the super IO chip. Is there a datasheet for it with any clues on why it suddenly requires these specific voltages+timings?
I was told that the timing need to be very specific on the chip, but i was never able to quote a datasheet or something similar for it! There must be something wrong with one off the voltages powering up and its timing, but i was never able to get a proper fix, only this workaround!
in my case i couldnt find the vtt ddr
You're in Germany, right? I've been following your videos for a while now but don't have the expertise and electrical engineering knowledge to follow along.
I recently got a palette of Q170T boards, about 70% working with 30% either being no-power or no-POST. If you'd be interested I'd mail you one for the cost of shipping (5€ or so) and if you think it's worth it to invest your time, you can have the broken ones for 5 a piece + shipping.
Hit me up on my E-mail in the description!
@@MainboardMedic Sent you an email. Thanks!
Do you have an electrical schematic repository? Could you send it to me?
If you need any specific one E-mail me...
Очень интересно. Лови лайк👍
Hello,🤝 good job regarding this motherboard, there must be some kind of manufacturing defect, during the video you say mass, you mean GND, in Poland they say similarly masa.P.S. Do you use any specific CPU models on AM4 for testing? Regards👍👍👍👍👏👏👏👏👏👏👏👋👋👋👋👋👋👋👋👋👋
Yes i really like the 2200G for testing. APU and its a early version so many are compatible. There are some B550 Boards and higher for which you need a 3000G, because they dont support 2000 series ans lower.
@@MainboardMedicHello, I also have Atlon 200GE and it is great, but it does not support full PCIe, I didn't know about it before, and my graphics card in the PCIe16 slot only read 4.3.0, thanks for the information, best regards👋👋👋👋
@@lucataszarek8782 That is true, i use the 2000G only for post testing, as soon as i can get into windows i use an 2600 so i can also fully load test and test the GPU lanes.
My theory is a massive power surge, that mosfet split , wasn’t damaged by a “person” that was sudden power…
That capacitor split in half, same, are they connected ?
Those are not connected. I would expect more charing if this would have been electrical nature.
Hello wie geht's und steht's, after watching a couple of your videos I wanted to ask your opinion on a problem I have with my motherboard.
Tl;dr is I scratched some wires/lines near the cpu after I forgot the washes for the cooler. Now the first pcie slot doesn't work, only signal though because cards in the slot get powered.
Would you have any advice maybe? xD
Well nothing more to do but to repair those traices, there is no way around that!
I think you should take a closer look at the start-up power sequence especially timings to solve this without another PCB. I'd bet there's one or more bad capacitors or resistors changing the timing of one of the circuits in a bad way.
I really tried to do that, but there is nothing on that line but a 1K ohm resistor that connects 3.3V with the pin off the SIO. There is nothing else but the resistor and the resistor is tested good. The only component that could be partially damaged is the SIO in my opinion.
@@MainboardMedic, no I mean way earlier than that in the power up sequence (32:36). Something seems to be messing up timings, preventing it from being in the state we assume it should be in. At least, that's my intuition as an embedded software engineer. I wish you had an oscilloscope to verify the startup timings were right, cuz at this point, it seems like a voltage on a line was high (or low) at a time when the startup sequence was expecting the opposite, and that prevented the chipset from completing initialization. Since RC circuits are used for timing, I suspect a resistor, or more likely, a capacitor is bad somewhere.
On the other hand, you're reading 3.3v on one side of that resistor and something completely unexpected on the other side... but when things are unexpected, in my experience, you have to reevaluate your assumptions... something is different than we assume.
If I had an oscilloscope, I'd start with finding where the timings go astray, and then find out why.
I lean this direction also. The SIO pulls the power ok pin down because something is wrong in the power up sequence. The injection is just a workaround with a lucky outcome. You are lucky not killed the SIO when applied 3V on the output pin. It is a difficult problem no question about that. You need a logic analyzer to probe all the power sequence pins and compare the result to the RG diagramm. It is a question how long th SIO chip tolerates this injection workaround.
How can we see resistor ohm values, part names, etc. in boardview? Only roads are visible?
Get schematic PDFs and use alongside with boardview
Some Boardviews dont include values and only connections. For ATX Mainboards the values are always displayed by clicking on the Component or hovering over it.
As you can see in the video, by clicking on the part on the right upper side of the screen are the informations needed shown.
Are you sure your ATX power supply has enough power? I have known weird things happen because one of the power rails haven't enough power..!!
It should have enough juice. I have tested many different boards with this setup, but it would be interesting and would explain why 2 Boards have the same issue!
Please don't put I/O shields on top of their motherboards - they can pick off smaller components and gouge traces. Don't make any more headaches for yourself than necessary.
Bag them separately and put them on the (bagged) board when storing the board (ALL motherboards should be ESD bagged - that thing about making more headaches applies especially to unprotected boards).
And no, "modern" boards are no more resistant to ESD damage than older ones.
wow,. 2 boards behave the same way. next you gotta build a mini board with adjustable voltage to fix this issue.
Why can't you just use a thermal camera to find the short instead of just use a multi meter on every single capacitor and mosfets? It's a lot faster than a multi meter
Been following your channel since the start. Do you have an email or contact info outside of YT comments? Would like to be able to have a more in depth conversation with you on several subjects if possible.
I do have an Email adress in my description at the end, where you can contact me with.
@@MainboardMedic Thank you, Wanted to be sure about it beforehand.
Both boards A Sus?
Sounds Sus to me, as in it seems Asus has found a way for their boards to brick themselves, and now you have found a way
to UN~Brick those boards that have bricked themselves..🤣😂😅 Err-on a serious note though..
I would suspect whatever chip "but only if all of it's voltages are present" needing replacing is the one that is suppose to
supply whatever missing or misbehaving voltage, in short there has to be one chip that is getting all of it's expected voltages
but it's not outputting to some other chip that is not getting all of it's voltages, in short sometimes we need to trace for
voltages backwards.
APU 👁👍
So there is only a single 1k ohm resistor between 3.3V and the SIO. And the resistor is tested good. So i would expect the SIO to be partially damaged.
@@MainboardMedic only if it has all input voltages/signals present, if one of those voltages or signals are not quite right then whatever is providing wrong signal or voltage needs more scrutiny.
I'm going to be honest here in that although I am not a mother board expert, I am confident that if any chip is not getting an expected voltage or signal it will not itself do what it is suppose to do ergo if some other signal intervened AKA yo voltage bodge following circuits will continue to function as if the previous original chip on board was functioning as designed..