Crash!! High pitch thru speakers then reboot 2 in one day!

shaneblyth · Post by **shaneblyth** » Sun Oct 06, 2013 8:04 am

6 month old KronosX never had an issue. Dead stock, nothing modified recently. No extra samples or anything loaded, all my patches are simple modifications of existing combis.
Twice today on the same piano / strings combi patch the keyboard emitted a high pitch for a second or two and rebooted while I wan playing. It didnt reboot properly and I had to turn the power off. I carried onfor an hour and no issues. Later that night was playing for half and hour on the same combo and in the middle of a song on stage same thing, high pitch sound through the speakers and rebooted I quickly powered it off let it come up and continued on.
This is making me very nervous, I have my keyboard hooked up to a UPS.
Is there a way to get an error log of the crash?
On it's reboot (not my power down and restart boot) it did say remove any usb but I dont run any usb devices in the Board.
So what do people think ?

Thanks

SanderXpander · Post by **SanderXpander** » Sun Oct 06, 2013 8:26 am

When I had a very similar problem it was loose/unseated RAM.

ronnfigg · Post by **ronnfigg** » Sun Oct 06, 2013 11:38 am

I had the same thing happen. Rebooted just fine at a rehearsal but the next day at home I had the system failure message. Took it into the shop. Ultimately I got a brand new Kronos. If you're still under warranty I would recommend taking it in for service. korg needs to know about this stuff.

genehart · Post by **genehart** » Sun Oct 06, 2013 4:56 pm

Also try to scan kronos HDD a couple of times just right after succesful boot, then reboot , then scan again ..I had some symptoms , I don't remember exactly , but they were alike ) and they all disappeared after rescanning an HDD (while scanning didn't reported any errors and the first scanning were "lost in thought" for a few minutes on ~72 percents )

shaneblyth · Post by **shaneblyth** » Sun Oct 06, 2013 5:41 pm

genehart wrote:Also try to scan kronos HDD a couple of times just right after succesful boot, then reboot , then scan again ..I had some symptoms , I don't remember exactly , but they were alike ) and they all disappeared after rescanning an HDD (while scanning didn't reported any errors and the first scanning were "lost in thought" for a few minutes on ~72 percents )

how do you scan the drive?

shaneblyth · Post by **shaneblyth** » Sun Oct 06, 2013 5:43 pm

SanderXpander wrote:When I had a very similar problem it was loose/unseated RAM.

is there a link or something or can you tell me how to get to the ram to check the seating...? thanks

genehart · Post by **genehart** » Sun Oct 06, 2013 6:04 pm

shaneblyth wrote:
genehart wrote:Also try to scan kronos HDD a couple of times just right after succesful boot, then reboot , then scan again ..I had some symptoms , I don't remember exactly , but they were alike ) and they all disappeared after rescanning an HDD (while scanning didn't reported any errors and the first scanning were "lost in thought" for a few minutes on ~72 percents )
how do you scan the drive?

I used the factory "Check Medium" command in the disk mode/utility

ahutnick · Post by **ahutnick** » Sun Oct 06, 2013 6:28 pm

My Kronos on two occasions also emitted a high pitched squeal but did not reboot. It did lock up so I had to turn off the Kronos and then power it back up and then everything was fine

SanderXpander · Post by **SanderXpander** » Sun Oct 06, 2013 9:00 pm

shaneblyth wrote:
SanderXpander wrote:When I had a very similar problem it was loose/unseated RAM.
is there a link or something or can you tell me how to get to the ram to check the seating...? thanks

You need to get the entire bottom plate off. I usually put my synths upside down on a duvet on me bed. Do you have a weighted keybed or an unweighted one? If unweighted it's pretty straightforward, just carefully remove the bottom screws, take it off and you'll see the RAM on the mobo. Be careful of static electricity. If weighted the process is the same but you'll need to take some more care to ensure the keybed is fixed correctly into the correct position.

shaneblyth · Post by **shaneblyth** » Sun Oct 06, 2013 11:59 pm

SanderXpander wrote:
shaneblyth wrote:
SanderXpander wrote:When I had a very similar problem it was loose/unseated RAM.
is there a link or something or can you tell me how to get to the ram to check the seating...? thanks
You need to get the entire bottom plate off. I usually put my synths upside down on a duvet on me bed. Do you have a weighted keybed or an unweighted one? If unweighted it's pretty straightforward, just carefully remove the bottom screws, take it off and you'll see the RAM on the mobo. Be careful of static electricity. If weighted the process is the same but you'll need to take some more care to ensure the keybed is fixed correctly into the correct position.

i did a media scan no errors.
Its a 73 key so its weighted.
Found a video on upgrading ram so watched it just to see inside but it had aluminium for a bottom plate where as mine has a wooden bottom and screws around the outside of the bottom and a row in the middle also. Do you need to undo all the screws on the bottom?
Ill try it after the media scan for a day or so and if nothing happens Ill leave it if there is an issue ill check the ram if thats no good it will have to go back.
Thanks

SanderXpander · Post by **SanderXpander** » Mon Oct 07, 2013 7:10 am

Media scan does the SSD (or any USB stick), it has nothing to do with RAM. Not saying the RAM is the issue for sure but it seems possible and at least media scan has no bearing on it.

Yes you need to get all screws out, the most annoying bit is putting it back together so that the keyboard isn't pushed all the way back into the felt strip yet you also don't get keys hitting the front bar. The keyboard is attached with 7 large screws in my case I think. It'll make sense when you're doing it. First fix the outter screws so the bottom plate is solid, then tighten the keyboard screws till there is just a bit of wiggle, and then experiment with tilting the board a bit to get the keyboard where you want it. Having the keyboard spacers into place can help. Eventually, tighten the screws firmly.

shaneblyth · Post by **shaneblyth** » Mon Oct 07, 2013 7:16 am

SanderXpander wrote:Media scan does the SSD (or any USB stick), it has nothing to do with RAM. Not saying the RAM is the issue for sure but it seems possible and at least media scan has no bearing on it.

Yes you need to get all screws out, the most annoying bit is putting it back together so that the keyboard isn't pushed all the way back into the felt strip yet you also don't get keys hitting the front bar. The keyboard is attached with 7 large screws in my case I think. It'll make sense when you're doing it. First fix the outter screws so the bottom plate is solid, then tighten the keyboard screws till there is just a bit of wiggle, and then experiment with tilting the board a bit to get the keyboard where you want it. Having the keyboard spacers into place can help. Eventually, tighten the screws firmly.

thanks for the clear instructions. I have given it a hard time today for hours playing and have gotten a bit rough while playing expecting that if it's the seating of the ram that should flick a reboot but so far so good Ill see how it goes appreciate your help. Invaluable.

michelkeijzers · Post by **michelkeijzers** » Mon Oct 07, 2013 10:20 am

Also it might be a software problem ... I assume (hope) you updated the OS to the latest version?

shaneblyth · Post by **shaneblyth** » Tue Oct 08, 2013 3:58 am

michelkeijzers wrote:Also it might be a software problem ... I assume (hope) you updated the OS to the latest version?

it came with 2.06

michelkeijzers · Post by **michelkeijzers** » Tue Oct 08, 2013 7:38 am

shaneblyth wrote:
michelkeijzers wrote:Also it might be a software problem ... I assume (hope) you updated the OS to the latest version?
it came with 2.06

Ok afaik that is the latest version...