How do I fix one key being louder than others?

This link might help.

https://www.google.com/search?q=Casio+Privia+px-100%2C+loud+key

..

Try a master reset to start with.
Turn keyboard off
Turn on whilst holding down highest note on keyboard
Once screen display has complete release key

This will reset to factory settings.
If this doesn't work report back and we can maybe try other solutions.

Dan
Becketts Music Ltd

No reason why only one note would sustain.
Try a factory reset
Hold down the highest key whilst turning on - see if this helps.

Hi
The normal reset is to hold down the highest note ( furtherst white key to the right ) at the same time as turning the instrument on. This will initiate a factory reset.

Hey, I had the same problem. You just have to off the Keyboard (by pressing the standby/on button).

Now hold the last key / highest key.
Keep holding it
And
On the keyboard while holding it.

Problem will be solved.

You may have turned down the volume internally.
Carry out a factory reset - Hold down top C key (highest note) whilst turning the keyboard on.
Hopefully this will rest everything and it will work again.

Hi, You can reset your whole keyboard by holding down the top C ( highest key ) whilst turning on.

This is unlikely to clear 3 non working keys. My guess is that the contacts under the rubber switches have worn or dust is under the contacts. You could try cleaning first under the rubber contacts if this fails replace the contacts ( 1 per octave ) Part WF212202 contact me if you need more information

Pictures attached may help

Resetting Instructions:
1) Try a partial reset by holding down the last white key while turning the unit ON.
2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

Reset Instructions:
1) Try a partial reset by holding down the last white key while turning the unit ON.
2) If you haven't recorded any performance(s), for a full reset, hold down on the last white key AND THE lst three black keys while turning the unit ON.

The key switches are scanned as a matrix. One of the matrix wires has broken or connector/cable is not making it... It will be a connection in common with the non-working keys.

Here is schematic:

http://elektrotanya.com/yamaha_psr-293_sm.pdf/download.html

On page 40 on the board labelled 61H-MK and the connector DMLCD-CN401 the connections to pins 11 and 12 with signal names N14 and N24 have become broken or disconnected before they get to the processor board.

Since these lines are NEAR an edge, the cable could be not quite in the connector at one end or the other. These two wires are what triggers the E and the A# key signals. There are TWO contacts per key as one closes first then the other... this is how they measure key velocity.