Help with piano keys fault

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Today a section of the keyboard on my digital piano stopped working. They make no sounds at all. They are 8 consecutive keys at the upper end of my Korg SP-200 piano. It's over 15 year's old and I'm wondering if this is the end or if there is some kind of fix for this. Any advice would be much appreciated.

dzd's picture

I know nothing specifically about digital keyboards. Have you tried just popping the top off and using some contact cleaner? Not canned air, that does nothing but blow dirt around, but it tends to work miracles on most older electronics.

Get yourself a can of Servisol and do a strip down. Works like magic.

Thanks for all the good advice here. I will try cleaning the inside electronics. @headfirstonly I was going to use WD-40 but I've read that it can be a little destructive. Is it Servisol Super 10 that you would recommend?

Yes, Super 10 is the stuff. It has resurrected faders for me, stopped pots getting crackly, and generally works its magic on switches of all kinds. I also use their "Aero Klene" if there's more gunk and dirt involved. Both evaporate quickly and most importantly they don't leave a residue behind. They're not cheap, but a can will last you years.

And the residue is why you shouldn't use WD-40. The WD stands for "Water Displacement" and it does that because it washes water away with a whole mix of alkanes. The lighter ones evaporate leaving behind the heavier ones, which are the sort of things you find in diesel and paraffin wax. They're just going to re-attract all the dust and dirt you just flushed away and will eventually make the problem worse than it was before you used it.

And as with all products like this, only use them in a well-ventilated area!

dzd's picture

Like @headfirstonly stated. While WD-40 was a spectacular invention for its time I wouldn't recommend it for really any use anymore, unless its just some rusty old hinge you don't care about or something. There are a ton of different and better alternatives. I'd recommend anything graphite, silicon, or even teflon based for anything you valued and don't want to have to keep spraying it.

I find some good cheap electronic sprays now and again, just have to look for something quick drying and leaves no residue. The dollar stores around here oftentimes even have some, but I use the cheap stuff on other things, weedeaters/mowers/power windows in the cars that get sketchy/the list is endless. For things electrical that I do care about I'll splurge, even though its probably the exact same stuff just comes with peace of mind Biggrin and as stated a can of it will last you for years.

Thanks again for all the helpful advice and information. I've ordered some Servisol - none of the local shops had any - and had a look at the back of the keyboard. It should be very easy to open up.

dzd's picture

Hopefully that'll do the trick!

@Roddy I don't mean to pour water on troubled oils, but unless some liquid was spilt, 8 consecutive keys would probably not have contact fail at same time. Worse case, a component that reads the key data has failed, which means a dude with a soldering iron gets involved. However, I found a few things on the web which makes me think that the rubber keybed has failed. See the you tube clips below. Different Korg but should be similar. If your going to clean the contacts anyway, you can get to the keybeds and swap one that works with the faulty one to see if the fault follows.

Thanks @msculli1 You certainly have a point about the possible cause of the trouble. The videos were really informative. I'll start with the Servisol and then if that doesn't work will go on to the silicone keypad strip.