20 Most Recent Korg KP3 KAOSS Pad DJ Effects Questions & Answers

This may be or not be a solution, but most times you have to format the SDHC card so that it is recognized by your Korg

I agree, it's probably either the power supply (has it a fuse?) or the power connector or the power switch or an internal fuse. Probably a simple fix.

You would need to use a TRANSFORMER type stepdown. If you have used one of the cheap ones intended for hair drier type appliances you have damaged your unit. You will have to send it to a repoair facility in that case. Here is example of CORRECT type:
http://www.world-import.com/transformers.htm

Question edited for clarity. It is a known issue, you need an electronics engineer. https://www.google.com/search?q=korg+m1+distorted+output ..

No one knows the fuse type, but the details should be on the fuse itself. Then you can't get them from an electronics store or Amazon. The Service Manual is in the link. https://www.google.com/search?q=Korg+n364+keyboard+replacement+fuse ..

See page 166 troubleshooting of user manual. It may help. 331ad6cf40f982ddcfbb201db1a6d34f.pdf (korg.com)

If you contact Korg, they can send you a dowloadable link to burn the software to a disc.

up to you if you ant to spend the money to have it diagnosed and repaired

$213 or take to an electronics service technician to diagnose which part got damaged and replace the component/s. https://reverb.com/au/item/69569832-korg-n364-n264-x2-x3-workstation-power-supply-board-assembly-part-klm-1633 https://www.google.com/search?q=Power+supply+board+of+Korg+X2 ..

Sounds like loss of memory\programming.Go to Korg website for download.

https://www.google.com/search?q=install+firmware+in+Korg+X50 ..