5 sticking notes

[moumaela]

Hi, My Korg Kronos has 5 notes that stick to the top and require extra pressure when playing them. This removes sensibility when playing these notes, and sometimes they get later pressed due to the fact that require more pressure than the other keys. When pressing slowing it feels like something gets jammed right at the very last millimeter just before the key gets 100% fully up.

I put compressed air to clean up any possible dust that could be jamming the keys, but that didn't work. Any ideas on how to solve this problem?

[voip]

I'm slightly confused by the description. Does this mean that the affected keys encounter stiction around 1% of the way down i.e. right at the beginning of playing the key stroke? Which keys are affected? Are they in the middle of the keyboard or towards one end? Is this the 88-key action?

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