> From: virusindigo2
>
> Hi, I just received a Chroma Polaris from a seller online.
> Cosmetically its in great condition, I have installed the
> factory presets and it has a new membrane panel that is fully
> functional.
>
> However, upon testing the synth it turns out the highest 3
> black keys do not work when played, or cause infinitely
> sustained notes that requires turning the synth off/on again
> to reset.
>
> Has anyone encountered this before and has any idea what the
> problem could be, and how to fix? I'm planning to get a quote
> from a tech but requires taking the synth into shop and
> waiting 7-10 business days for them to even look at it.
>
> Any help appreciated, thanks.

The keyboard switches are very susceptible to contamination, but they're
also pretty easy to dismantle and clean with alcohol. Take the boards off,
take the silicone dome switches off the board, clean the board, clean the
contact areas on the switches, and put it all back together. It's also
possible that the metal tabs that determines where the keys come to rest
are a little bent, and need bending back.

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...