I have a korg keyboard I need to replace a key

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

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Here's a video showing you exactly what to do! https://www.youtube.com/watch?v=HXFN0LymD0Q

What do you mean by applied graphite...graphite powder? That is not the solution I wouldn't think, you need to use a keyboard contact repair kit, which has a solution you paint on? Something like the link provided might be in order. Make sure there are no improper conductive bridges formed between the contacts in the PCB board surfaces. Replacement rubber pads (the part that presses down) are available from any decent service provider (try Syntaur if can't find http://syntaur.com/korg_x.html ) (beneath key) Korg Key Contact Repair Kit Replacement Keys and Parts for Korg Series Keyboards

http://i.korg.com/uploads/Support/USA_KROSS_OpG_E(1).pdf

Check page 21

It's about hardwares.
If dead keys are the same notes(C2-C3-C4 or E2-E3-E5 etc),its electronic parts problem.
If dead keys are random(D1-F1-G3-B5 etc),chances are :

• Rubber keypads is break. Below the keyboard. Replace it.
• Dust can cause bad contact the carbon inside the rubber keypad. Clean it.

I wouldn't recommend doing that, because your OS system could freeze occasionally

It's about hardwares.
Wiring connection sockets is loose.
Inside the korg PA50,Wiring connection to the keyboard is separate to left and right.
Open/disassemble your korg.
Look for connection cable to the left keyboard.
One end is on the keyboard,the other end is at the mainboard.
Unplug both of it, then mounted again.
For master volume,better buy new one.

Hello I have this M50 61 key korg model, I had the same issue the fix is simple remove the back cover on the unit, carefully push in all the small cables reattach them well do it to all the small connectors these cables get lose and cause this issue, good luck let me know if that helped I fixed mines that way its been working excellent since. good luck..

Korg Support advises that they can either provide you end cap or direct you to a retailer. CLICK HERE

Typically lots of screws to remove. Be careful unplugging any ribbon cables. The cables are easily damamged by exerting force on just the edges.

Have new parts available BEFORE taking it apart for repair.