Today I received my new Privia px830 and three keys works as an interruptor: play notes at full intensity. Are sensors cracked?

SOURCE: MIDI Keyboard note delay problem, not latency problem PLEASE HELP

You are suffering from midi latency. There is a good article about this at www.thewhippinpost.co.uk/latency.htm There is also some good advice there.

SOURCE: I have a Casio Privia PX-320. The left side keys

Check that the front of the keys is not hitting the lower plastic case front. If they hit it, then you need to disassemble the case partly and see what has shifted. It is ALSO possible that something has caaaused the aftertouch sensor to move out of position and it is hitting the keys early. ANY of these conditions needs to be addressed before damage is done.

SOURCE: My Casio Privia PX-110 is playing two notes at

IF every key sounds like it is doing that, you may have two voices selected with one of them being transposed.

You may have an "effect" turned on that generates a chorus, layered or multiple voice sounds.

SOURCE: casio privia key issue

The only way to analyze this is to open the case. You may find contaminating material has gotten in, or broken part, or key slightly out of position on pivots or pivot plastic broken.

When opening, be VERY careful of the tender ribbon cables. Have a large work surface that you can unfold the top onto. Be careful to use correct screw lengths and thread in each place you removed.

SOURCE: I've recently purchased a Roland

Sorry, but Roland uses the opposite sense switch. They use normally closed where Casio requires normally open contacts. SOMETIMES one can rewire the pedal internally, but you have to be mechanically and electrically inclined to do that.