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MIDI controller dead keys repair advice
Old 4 weeks ago
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MIDI controller dead keys repair advice

I had a dead key on my Novation SL mk II MIDI controller. I saw a video on youtube where for a keyboard with a similar mechanism, the dead key could be fixed by cleaning the interior, especially the contacts on the PCB. I attached a picture of the style of contact.


I removed some material that had made its way inside the keyboard. Then I removed the rubber, and cleaned the PCB and the rubber with alcohol. I reassembled and the dead key was fixed. However soon after two new dead keys have appeared, different from the first one. I am not sure what to do since I just cleaned it.
I pulled off the pcb from the keybed and I can trigger each key successfully by pressing on the rubber. So it seems like the contacts for these dead keys function at least partially. I don't know if the dead keys are somehow a byproduct of my re-assembly, maybe the rubber is slightly displaced and the key-bed mechanism isn't connecting with it. Or maybe those contacts have lost sensitivity somehow. I can still trigger them by pushing on the rubber with my finger though. If I reattach the PCB the same keys still don't work.

Has anyone had a similar experience to this? Do you have any advice for fixing dead keys for this style of keyboard? When should I consider it a lost cause?
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MIDI controller dead keys repair advice-sxvxzux.jpg  
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