# Korg Krome 88 replacement key contact board not working

**URL:** <https://forums.syntaur.com/t/korg-krome-88-replacement-key-contact-board-not-working/9362>\
**Category:** Synth Repair\
**Tags:** korg, krome-88, keybed-contacts\
**Created:** [March 5, 2026, 10:59am UTC](https://forums.syntaur.com/t/korg-krome-88-replacement-key-contact-board-not-working/9362 "2026-03-05T10:59:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![macrophage31899](https://forums.syntaur.com/letter_avatar_proxy/v4/letter/m/8c91f0/32.png) [@macrophage31899](https://forums.syntaur.com/u/macrophage31899)\
**Post date:** [March 5, 2026, 10:59am UTC](https://forums.syntaur.com/t/korg-krome-88-replacement-key-contact-board-not-working/9362/1 "2026-03-05T10:59:37Z")

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Hello all!  
I’m repairing a Korg Krome 88 that was given to me for free due to key contact problems.

After trying to use new rubber contact strips I discovered that many of the contact points on the boards themselves were worn, so I ordered a replacement set of boards. After installation I replaced the contact strips, keys, ect., and… nothing. No sound at all from any key.

I began systematic testing in an attempt to find the problem. First, I plugged in my headphones and turned the volume knob up and down. I can still hear the (very) faint hiss of white noise that changes when I turn the volume knob, which suggests that current is still being conveyed across the audio outputs

Secondly, I checked the velocity meter on the display. Nothing there either, for any key. That tells me that the motherboard is not receiving a signal from the keybed itself.

I then checked the 16-part cable that connects to the new contact boards. All channels are conducting properly.

As I looked at the new boards, I noticed a dark green substance spread over the contact points which is not present in any amount on the old boards. Is this merely a conductive compound, or is it a manufacturing protectant that should be removed?

 ![IMG_20260305_023007224_HDR](https://forums.syntaur.com/uploads/default/original/2X/5/5ffc81d3378e4472db2e46f5a8cd0c07b4cf9e9a.jpeg)

Also, while removing the small ribbon cables that connect the boards together I noticed that the old boards have FPC connectors that are slightly more bulky than the new ones.

Is this possibly the issue, or is there something simple which I am overlooking (which is entirely possible!)?

Thank you in advance for your advice!