Korg Forums

dbx1214 · Joined: 14 Jul 2017 Posts: 16

Hello.

I have a problem with my Kronos X73.

When I turn off Kronos and then turn on, i see the Kronos logo (for 0,1s) and then nothing. Black screen, and Kronos is dead (power button still ON).

Next, I switch power button OFF, 10 sec., switch to ON, and the same! Shot of Kronos logo and nothing more...

After 5,6 try Kronos is starting correctly and works good, and long.

I bought an used one. First thing i update from 3.0.2 to 3.1.2.

After update i have this problem.

I tried 3,4 times reinstall 3.1.2 system.

Any Ideas?

GregC · Posted: Fri Jul 14, 2017 10:48 pm Post subject:

Since you suggested that the cause was the OS update, go back to 3.0.2

If it works 100% consistently, on 3.0.2, at least you do not have that frustrating start up problem

I also suspect its a buggy 3.1.2 OS update. After your Kronos stabilizes, you could try a new 3.1.2.

it could be a latent hardware issue. Given what you posted , I would try to go back to 3.0.2, to troubleshoot what is going on
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Kronos 88. MODX8
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dbx1214 · Joined: 14 Jul 2017 Posts: 16

I installed OS 3.0.2 and problem still exist Sad

I noticed one thing.

When i work on Kronos, turn it off and in few seconds turn on, it does't start... But when i work on Kronos, turn off and wait a long while (about 3 min or more) it often starts correctly.

This's points more to the hardware?

GregC · Posted: Fri Jul 14, 2017 11:59 pm Post subject:

dbx1214 · Joined: 14 Jul 2017 Posts: 16

I changed my RAM memory and it doesn't fix it. Probably in my house, there is unstable electric current. Is it possible that this is an reason? Things happen randomly.

AntonySharmman · Posted: Thu Jul 20, 2017 9:28 am Post subject:

Grid fluctuations do not affect PSU (SMPS) of Kronos , only discontinued grid power supply where a UPS is needed.
It looks more like SSD system files data corruption , but also try to un-plug/plug SSD SATA 2 red cable from
motherboard, I've noticed it once in a customer's case.
Also all of you note the "gold" rule of updading OS : Never Update OS without UPS support !
In fact , this is the case of the critical use of a UPS !
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook

Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V

dbx1214 · Joined: 14 Jul 2017 Posts: 16

So, if its problem with SSD files, what can I do now? Format SSD?

AntonySharmman · Posted: Thu Jul 20, 2017 10:06 am Post subject:

You have to use restore DVDs , search (by Google) forum for topics about this.
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook

Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V

dbx1214 · Joined: 14 Jul 2017 Posts: 16

I tried to reinstall from DVD's. It doesn't work Sad

. This is weird, that it's a problem with booting, but if the booting is correct, My Kronos may works even 100 hours.

If i turn off and immediately turn on, it doesnt run. But if i turn off and wait 5-10 minues, Kronos often boot correctly.

Maybe i try run my Kronos in other place. I suggest, that in my house there is some kind of problem with electric current. (Other devices like Mac's, TV, Hi-Fi, Kitchen) works correctly...)

Can it be a problem with power supply?

dbx1214 · Joined: 14 Jul 2017 Posts: 16

https://youtu.be/AldmiGeuNWg

dbx1214 · Joined: 14 Jul 2017 Posts: 16

Below there's link.

dbx1214 · Joined: 14 Jul 2017 Posts: 16

https://youtu.be/AIdmiGeuNWg

AntonySharmman · Posted: Thu Jul 20, 2017 5:37 pm Post subject:

Video shows another thing that you didn't mentioned !
My dear friend your Kronos PSU (SMPS) model "Enhance ENO-1612" (Chinese manu) will completely fail soon ,
this is the first symptom ! so do not deal anymore with other software or hardware failure issues !
At that time you will visit official korg service !
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook

Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V

massca · Joined: 10 Jun 2005 Posts: 13 Location: Italy

Hi Antony, I have the same problem on my KX that I bought one month ago Sad

Do you know if it is possible to buy this spare part, or find a compatible PSU? I did a quick search but did not find anything useful.
_________________
Korg KronosX 73, Nord Electro4 73, Roland VP770, Yamaha Tyros2, Main Stage, MacBook Pro 15.

AntonySharmman · Posted: Sat Jul 22, 2017 11:47 am Post subject:

Try this first http://www.enhanceusa.com/webe/html/products/show.aspx?num=90&kind=55&page=1
Another great and cheaper solution is to use and adapt inside Kronos a 12V PSU and a PICO mini-ITX 120-160W power supply.

http://www.ebay.com/itm/Pico-ATX-Switch-PSU-Car-Auto-Mini-ITX-High-Power-Supply-Module-12V-DC-160W-24Pin-/151795922578?epid=507254951&hash=item2357bdf692:g:DOoAAOSwjVVV4RuA

http://www.ebay.com/itm/120W-12V-10A-Power-Supply-AC-Adapter-4-5050-5630-LED-Strip-Light-CCTV-Camera-BK-/253037960838?hash=item3aea3cde86:g:-gQAAOSwAPlXgzgu

but technical skills are required !
_________________
Music Conductor - Sound Engineer & Developer - Automotive SMPS/RF R&D - Electronics Engineer
PaSeries Demos - WavesArt.eu - KorgPa.gr <> Facebook

Keyboards : Steinway-D, Kronos X, Pa5X 76, Pa4X 76, Montage M7 , Roland-XV88, Emu3,Emax II,Synclavier II,Yamaha DX Series, ΟΒ-8V