Author Topic: Mainboard Suicide after Sleep  (Read 5053 times)

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Offline dicky96

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  • Posts: 188
  • Country: es
Re: Mainboard Suicide after Sleep
« Reply #50 on: April 14, 2020, 06:05:24 pm »

Hi Dicky,

i'm not sure if i'm getting your question right, but the FETs at the Phase-Inductors are completely identified in the Boardview file... You've mentioned
"K03J4 3G2 62D1" and "K03J5 3C5 60G1". That fits the Boardview Information quiet well:

-  N-MOSFET RJK03J4DPA    WPAK(3) RENESAS/30V/4.6MOHM
-  N-MOSFET RJK03J5DPA    WPAK(3) RENESAS/30V/7.2MOHM
Damn I should have thought to look there lol.  Now I can find them on Aliexpress

I've already ordered some of the  ISL6625ACRZ as I think that is what is playing up here.   I may as well get a few FETs as I can get a pack of 5 for less that 3 euros and it's good to keep parts in stock.

Cheers
 

Offline TonyBe

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  • Country: de
Re: Mainboard Suicide after Sleep
« Reply #51 on: April 17, 2020, 03:06:28 pm »
Nice :) Happy to was able to help you.

I got some good news today. I managed to get my reworkstation back to life, changed the DCDC Chip that I discovered to be faulty.

And well: the MB stays on when powering on. Since i've no CPU to test with, i'm not 100% sure if everthing is working. But I think the chances are good, since this was the only issue.

Yet again: thank you all!

Dicky: i'll stay tuned for your issue. :)

Regards
Tony
 

Offline koincidencia

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  • Country: hu
Re: Mainboard Suicide after Sleep
« Reply #52 on: January 28, 2021, 03:46:44 pm »
Hello everyone,

I have an Asrock Z87M Extreme4 MB. We had a power outage and after that, the PC was not able to turn on, it was continuously resetting in a similar way as TonyBe described. It was confusing, because without memory, if I left the system with an unplugged power supply for 2+ minutes, then after the first power-up I got 3 long beeps (indicating missing RAM), but if I have reset the system it was going back to this reset loop.

Based on this forum thread I could identify that the same DCDC converter IC is bad. I have fed 1.05V to the south-bridge rail and I was able to get into the BIOS. I am waiting for RT8065ZQW chips, hopefully replacing them will fix my issue as well.

I am just writing this message to thank all of you for writing about your experience and debugging, which helped me a lot!
 

Offline wlundall

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  • Country: za
Z97 Extreep4 NCT6776D
« Reply #53 on: June 20, 2021, 01:01:00 am »
Re NCT6776D :
Hey Guys.. Is it any way possible to replace this chip.. i have a ASAROCK z97 extrem 4 and seems like my chip died. can see it is burnt

Could i simply buy  a chip and re  Z9solder it any help would be appreciated

Keep Well be safe
Thanks To any one who reeds this
 

Offline LateLesley

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Re: Z97 Extreep4 NCT6776D
« Reply #54 on: June 20, 2021, 02:39:19 am »
Re NCT6776D :
Hey Guys.. Is it any way possible to replace this chip.. i have a ASAROCK z97 extrem 4 and seems like my chip died. can see it is burnt

Could i simply buy  a chip and re  Z9solder it any help would be appreciated

Keep Well be safe
Thanks To any one who reeds this

With the right tools, yes. But there may be more you'd have to do. The chips don't burn up for no reason, so before you replace the chip, you should get the datasheet, take off the old chip, then test all the powerlines first. It's probably not blown for no reason, so it's important you check out what caused it to pop.

That chip is what they call the Super IO chip, it does your keyboard interface, voltage monitoring, fan control etc. It's a multi-function chip.

https://www.nuvoton.com/products/cloud-computing/i-o/super-i-o-series/nct6776d/

To replace it, you'll probably need a hot air station, and soldering iron, and some decent flux. If you are in a pinch though, I have seen chips removed using a GU10 50W light bulb.
It's a hacky way to do it, but can be used if you are REALLY stuck. Hot air station is the best way.

You'll also need a multimeter with decent probes, so you can test the powerlines with the chip off the board. Which may take some doing, as I think it needs that chip to power some stuff on. :-) You might be jumpering things out to test them.

But do try and figure out what caused it to burn up. Look for shorted caps, or regulators (LDOs) that have failed. Because if you don't find what popped it in the first place, it may just burn up a new chip.

I wish you luck in your repair adventures. :-)



« Last Edit: June 20, 2021, 02:45:12 am by LateLesley »
 


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