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tunaman Senior Member
Joined: 28 Nov 2019 Posts: 427
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Posted: Fri Jan 06, 2023 12:45 am Post subject: Anyone Buy A Replacement Motherboard Recently? |
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I just spoke with the Korg tech who is troubleshooting my second K2 73, and he has yet to get it to fail (as described in another thread). It failed intermittently, but frequent enough, that I had to get it diagnosed and serviced.
I had already bought a new power supply and piggy-backed it on the original for testing purposes, and it still failed indicating that it wasn’t due to the PS.
He checked the Korg site, and it showed the motherboard as discontinued. However, I seem to recall seeing someone post that they were able to source a replacement relatively recently? |
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CliveJ Junior Member
Joined: 30 Dec 2020 Posts: 91
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Posted: Fri Jan 06, 2023 10:35 am Post subject: |
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This is probably a dumb question - won’t a Nautilus motherboard do the job? _________________ Now let’s think of a reason why it CAN be done... |
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tunaman Senior Member
Joined: 28 Nov 2019 Posts: 427
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Posted: Fri Jan 06, 2023 3:42 pm Post subject: |
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As they say, the only dumb question is the one not asked
Not sure if they are compatible or not, but it is worth looking into. I’ll ask my Korg tech to check into it, thanks! |
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CliveJ Junior Member
Joined: 30 Dec 2020 Posts: 91
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Posted: Fri Jan 06, 2023 3:44 pm Post subject: |
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Please let us know how you get on. _________________ Now let’s think of a reason why it CAN be done... |
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McHale Platinum Member
Joined: 10 Feb 2009 Posts: 2487 Location: B.F.E.
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Posted: Sat Jan 07, 2023 3:49 pm Post subject: |
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When my Kronos died I was positive it was the power supply. It was not. It was the motherboard. I picked up mine from ebay for like $40. Since then I have picked up 2 more spares that sit in a box just in case.
Korg used off the shelf PC motherboards. I believe yours is an Intel Atom D525 (mine's a 510). BUT... open it up to confirm. Ebay has them all the time.
-Mc _________________ Current Korg Gear: KRONOS 88 (4GB), M50-73 (PS mod), RADIAS-73, Electribe MX, Triton Pro (MOSS, SCSI, CF, 64MB RAM), SQ-64, DVP-1, MEX-8000, MR-1, KAOSSilator, nanoKey, nanoKontrol, 3x nanoPad 2, 3x DS1H, 7x PS1, FC7 (yes Korg, NOT Yamaha). |
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tunaman Senior Member
Joined: 28 Nov 2019 Posts: 427
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Posted: Sat Jan 07, 2023 7:33 pm Post subject: |
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Thanks. I took a glance this morning and see several different motherboards available, with several different I/O configurations for connectors and such. I’ll have to dig in deeper and get one of mine opened up to look at the specifics more closely.
Appreciate the suggestion! |
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Xenophile Senior Member
Joined: 14 Nov 2017 Posts: 349
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Posted: Sun Jan 08, 2023 5:14 am Post subject: |
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My understanding is that, though there are several commodity motherboards that will work, some will require modifications to either the board or Kronos due to physical size constraints and location of connectors. I think I read that here a few years ago. |
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Xenophile Senior Member
Joined: 14 Nov 2017 Posts: 349
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average_male Senior Member
Joined: 07 Feb 2011 Posts: 278
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Posted: Sun Jan 08, 2023 7:26 pm Post subject: |
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That is for the V1 Kronos. The Kornos V2 uses ASRock 140D Plus motherboards.
And it seems the service manual you are referring to may be noting V2 of the manual and not the Kronos? |
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Xenophile Senior Member
Joined: 14 Nov 2017 Posts: 349
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Posted: Mon Jan 09, 2023 4:47 pm Post subject: |
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average_male wrote: |
That is for the V1 Kronos. The Kornos V2 uses ASRock 140D Plus motherboards.
And it seems the service manual you are referring to may be noting V2 of the manual and not the Kronos? |
You’re right. In fact I was recently griping in another thread about not being able to find a service manual for Kronos 2. The “V2” manual just comprehends Kronos and Kronos X, and calls out the fact that they have different motherboards. I didn’t realize Korg had changed motherboards again, even though I’ve been inside my Kronos 2 a few times. |
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Xenophile Senior Member
Joined: 14 Nov 2017 Posts: 349
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average_male Senior Member
Joined: 07 Feb 2011 Posts: 278
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Posted: Mon Jan 09, 2023 5:46 pm Post subject: |
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For the OP (or anyone else that currently needs a K2 motherboard), this seller has two of them (used and from the UK).
https://www.ebay.com/itm/404095085468
(Apologies to anyone referencing this link in the distant future as the listing will be expired at some point. I did attempt archive it at: https://web.archive.org/web/*/https://www.ebay.com/itm/404095085468* or here: https://web.archive.org/web/20230109174208/https://www.ebay.com/itm/404095085468)
These are the same 140D Plus model, however, if you compare these with the ones currently in the Kronos 2, the Kronos 2 motherboards have some components removed, like the "mini PCIe" and "mini-SATA" ports on the back of the motherboard. There are several other components on the top side of the board also have been removed. Guessing with the model currently on eBay, these motherboards may consume more resources (processing power and current) and may need to have some bios settings changed to match stock Kronos 2 motherboards? |
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Xenophile Senior Member
Joined: 14 Nov 2017 Posts: 349
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Posted: Mon Jan 09, 2023 6:43 pm Post subject: |
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I see someone in Pakistan trying to sell those ASRock boards for $950 plus shipping.
I'm not sure, but I think Korg service centers can still get the original boards for around $400. I had mine replaced a few years ago, while my K2 was still under warranty. I think that is kind of a default repair when Kronos gets flaky. |
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cjfox
Joined: 08 Oct 2012 Posts: 38
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Posted: Tue Jan 10, 2023 10:00 pm Post subject: |
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For what it's worth, I've replaced the MB in my original Kronos 61. I got a used D510 off ebay, It worked, but shortly after that the power supply went, taking out the video driver board. I documented all my efforts in another thread. I've got it back working, but it freezes after exactly one hour. I've tried to change the BIOS settings with no change. The Korg repair tech near me was no help and it sat in his shop for months before I finally took it home to do the work myself. From researching the forum, I have found out: Korg does not sell the D510 MB anymore, they will sell the D525 which requires the V2 operating system discs, and also a different power supply harness, and a different I/O board. I am frustrated with the whole situation, as I loved my Kronos when it was working. Too many parts on the original are no longer available, and you risk going down the rabbit hole of replacing multiple parts. |
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JFree Full Member
Joined: 21 Aug 2011 Posts: 202 Location: Walden, NY USA
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Posted: Thu Jan 12, 2023 12:45 am Post subject: |
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Looks like I'm in the need a motherboard boat. Looking for an original new, or if anyone discovers documented info on a substitution if there is such a thing. It seems like all of a sudden lots of people are having issues. |
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