Asus prime Z390-P no reaction to power button || Motherboard repair ATX
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- Опубліковано 26 лис 2024
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That Engineer solder sucker you have is amazing. A really great tool. It really sucks!!!!!!!! Can also be operated fully one handed, including solder ejection.
This would be a good candidate for a PCH replacement. You may be able to find a used PCH from a Donor board or maybe from Ali Express? I would love to see you make an attempt. I have faith you can do it. If Sorin from Electronic Repair School channel can do it then so can you, A standard 480 degrees Hot Air station should be able to do it. BTW, You made a good and sound diagnosis. Well Done!
great analysis, congratulations
Nice work. Your persistence is admirable.
Hi nice vid...in 13:01 and 22:36 I think see the cristal near to PCH.... the legs of cristal seems touch (short) between them....thanks for share..
I am working on a Asus B360 board that has exactly the same issue as your board. All voltages are there, but the PCH is not sending out the SLP_S3 signal. "Reflowing" (at 160°C from the back for a couple of minutes) did not help at all. I guess that the PCH is dead, because it worked the first time I got it for repair (just no POST). I would love to see you attempt a PCH replacement, as well as a short guide to clean the ME region.
Viele Grüße aus Thüringen, deine Videos sind großartig!
On modern chipsets, there must be a power source - either 5VSB or the battery - in order to be able to do CMOS reset. Or some residual charge in the RTC circuit. This is because the reset procedure isn't at all simple, and what happens when you jump the CMOS reset pins is that the RTC circuit latches a single flag which is checked to perform the complete procedure at the start of next boot, so the RTC circuit must be kept alive in order to signal the reset.
When you short the battery as a rule nothing at all happens, as the diode bridge that supplies RTC selectively from standby voltage or from the battery and prevents the battery from being charged in-circuit, also prevents the shorted battery from draining the residual charge out of the RTC/NVRAM circuit. In the not so distant past, the CMOS reset jumper sat just downstream of this power source merge circuit and would actually work by charge-draining the RTC.
Very good to know, so using the jumper provided on the board is different to shorting the contacts on the battery!
I have a B85 motherboard which died, I think I have the same issues, did similar diagnostic to you and found signal from power button reaching the PCH but no change in sleep states, I believe PCH died too.
Try to reflow to the PCH. Sometimes it starts working for a bit again, which can help confirm your diagnosis.
I wouldn't try to reflow the PCH, but I would try to heat it up with 200 degrees on the hot air for a couple of minutes heating the die only. I have a z97 board that had the same symptom and it came back to life. This also worked for a northbridge problem on an am3 board I have but it ended up losing some pcie lanes. The idea behind this procedure is to soften the resin beneath the die and allow any broken high lead balls to come back into contact (making this a temporary fix). There are some videos on the subject, most notably Louis Rossmann's video on why reflowing is bullshit and Rip Felix videos on PS3 gpu problems.
I could try that! Thanks for the recommendation!
Interesting case, I think you should also try to inject missing signals s3 s4 manually and see if it gets life.
I tried that with no reaction from the board!
I bought a z390 gaming plus, no bend pins no nothing.
And i remembered a video of yours that all 390 have broken pch.
Guess what the pch is cracked hahaha.
I cannot belive how many of these just have dead Chipsets, its just ridiculous and very frustrating!
@@MainboardMedic those chips probably work with high temp.
The cooling was done with a thermal pad not paste
@@labeatjasiqi6649 Paste would be bad choice as force given by just two small springs is not enough to ensure good contact. That's why pads or putty is used by all manufacturers.
But quality of one used by Asus is terrible and everyone who made mistake buying their board during last 5-6 years should replace it. Same goes for pads on Asus GPUs.
@@MainboardMedic
Is it similar for 490 chipsets? I've just acquired two boards for my first ever motherboard guinea pigs.
One is a gigabyte aorus z490. I found a shorted trail bottom right corner. In standby the PCH immediately gets really hot so 99% certain it's the PCH that's short.
I lifted the inductor, it's not the MOSFET short like I was first optimistically hoping for. I've removed all the 'short' capacitors I could find on the line (presumably between the PCH and inductor I lifted) and yeah made no difference, so that sucks I think it's the PCH!
@@harveystedham9490 Hey there, sadly Z490 is also shorted very often just like Z390! Thats the sad reallity with fixing intel Motherboard of that era!
Well the PCH does get hot as a rule, so it could absolutely give up the ghost after a sustained period of time.
Can you please, please put in the links to the software and the documentation sources used, thanks.
@12:55 it looks like the leads of the timing crystal by the PCH is shorted. If there's no clock it won't run...
It only looks like it because the depth is missing with my microscope!
a board thats good for spare parts caps resistors etc
I might keep it for learning to replace PCH´s in the future!
low resistance on 3v is highly suspicious maybe do voltage injection on that rail?
I tried that, there is very little power draw, about 110 mA
Have the same Problem on Asrock B450 Pro4 1.01 but it has the same SuperIO NCT6779D when i heated the area near Bios And CLKRTC Near Bios Header using hair dryer and press the power button and the motherboard turn on, but now it doesn't want to turn on anymore, except I touch one of RTC Oscillator and press power button and the motherboard turn on but no post😞
boardview Asus prime Z390-P ,please ? thankyou !
hi bro , i have a giga h110 . this board no power . signal slp_s3 missing in sio . is PCH gone?
I didnt show it in the video, but i tried that as well, you could supply it by yourself with a lab bench pwoer supply and see if that gets any further! If you have done the checks i did in the video you might have a bad PCH! You will need to also check the restistance on that line and also continuety!
Another one for the dead PCH pile
Why not try and reflow the PCH
These mobos are very unreliable,the y should be lawsuited for these absolute garbage products
I had no idea these boards had questionable reputation. I am new at PC hobby and building so am learning the hard way.
Heat that pch, see what happens.
You think it might come back? Or just to see its resistance change?
Wow, I am trying to find what is wrong with my Asrock Z390M Pro4 mATX board. I got it used and wanted to install it to build a PC for my grandson. The board starts, fan spins on CPU but it does not display out using the HDMI, DVI or DP ports. It does not display out on the #1 PCIE 3.0 x 16 slot either using a graphics card. All I/O USB ports work good but display ports next to them are dead. It WILL only display and allows into BIOS using the PCIE 3.0 X 4 slot at the very bottom of the board so I was able to use Asrock BIOS flash utility to install new BIOS too. It has no POST LEDs and my speaker is silent no code beeps. It only beeps once when it does post using only PCIE X 4 slot. I checked all CPU pins using lighted microscope tool and all ok. Even cleaned the board with soap/water and toothbrush to flush any particles. After drying it all was cleaned nicely but next day I found one capacitor on lower left side next to a PCIE 3.0 X 1 slot that has a dark yellow substance on it's base. Could be the problem? Easy to fix for me if so. But I have no experience going further into diagnosis. I found this channel trying to find step by step how to use my multi meter to check SMC, mosfett capacitors etc but can not find any pin out schematic information anywhere. Liked and subscribed to follow along and learn about this type of diagnosis.
Hey there, there are PCIE lane testers out there! Which you can plug into the PCIE and there are LED´s on them that show if you have a connection to the CPU or PCH!
Caps next to x16 PCIe slot connect it directly to CPU and your problem is most likely there (if socket itself is ok).
If you mean aluminium electrolytic capacitors, the cans, none of them in that area are interesting with regard to your issue. All of them simply buffer major rails to reduce stray currents, but are generally redundant with the capacitors on the cards and don't do anything when there's no card installed nearby. A minor exception is one between X4 and X1 sockets in the south, that buffers 5VSB for the 3.3V regulator right nearby, that's the 3-legged device with a tab, which is not your problem either. Furthermore since it's soldered through the board that's probably just unwashed rosin and you don't need to worry about it, they don't do a second solvent wash of the board after wave soldering.
You can't get a schematic for your board but you can get a boardview, good luck, keep looking. I can't tell you outright where, sorry, the comment section robot doesn't like it.
@@SianaGearz - Ah ok got it, and thanks again for your helpful replies, much appreciated friend, Best Regards.