Casio Privia 410r Piano soft pedal problem

It sounds like you may be experiencing issues with the sustain pedal on your Casio CDP-100 digital piano. The problem may not be with the pedal itself, but with the internal connections or circuitry of the piano.
If you're unable to factory reset the piano and it's not responding to the sustain pedal, it's likely that there is a problem with the main board. This is a complex issue that may require professional repair.
However, before giving up on it, you can try the following steps:

1. Check the connections: Make sure that all of the connections between the pedal, the piano, and the power supply are secure and that there is no damage to the cables.
2. Check the power supply: Make sure that the power supply is working properly and that the piano is receiving power.
3. Try to update the firmware: Check if there is a firmware update available for your piano on the Casio website. Updating the firmware may fix the problem.
4. Check the manual: Consult the piano's manual for troubleshooting steps, it may have some information that can help you.

If none of these steps work, it is likely that the problem is with the main board and it will need to be repaired by a professional technician. Unfortunately, this can be an expensive repair. Keep in mind that attempting to repair a digital piano can be dangerous if you're not familiar with the proper procedures and safety precautions.
It's important to keep in mind that the piano was second hand and you were aware of a problem with it and you have been given a lower price as a result. It is also important to note that buying second hand musical instruments may have hidden issues, which is why it's always advisable to inspect it thoroughly before buying it or to buy from a reputable seller who can give you a warranty.
Regenerate response

It is a known issue on this model.

https://www.google.com/search?q=%22casio+privia+px-100%22+pedal+not+working

Reset....but

https://www.fixya.com/support/t21517149-reset_privia_px_110_back_factory_setting

https://www.google.com/search?q=%22casio+privia+px-100%22+reset

..

You don't need to reset factory.
You just need to change the setting of LOCAL CONTROL.
Lets start :::
While holding TONE / SETTING button,press key D#7 at 7th octave (highest octave on the right hand). Then release. That's all.
Then the sound must be heard..

http://www.circuit-encyclopedia.com/listinfo-67-111.html
Download Service Manual for PX-410R as PX-410R is the same model as PX-575r.

Try this
1. Turn off the digital piano
2. While holding down both the (TONE) and (FUNCTION) buttons, press the (POWER) button

It could be that the electronics of the pedal are dirty, or that dirt has collected under it causing it to not depress all the way. Try taking it apart and cleaning it with a Q-tip and rubbing alcohol. Be very careful of any wires or delicate articles.

Yep... Roland pedals are reversed, that is, normally closed contacts. Unlike some Yamaha keyboards, the Casio doesn't have an inversion function available. You have two choices to solve this: 1. Buy a pedal with the corect sense 2. Open the Roland pedal and MAYBE with a soldering iron you can move a wire to select a contact with the opposite sense.

The Yamaha FC-3 uses a TRS (three conductor plug). The PX330 does NOT use TRS jacks for the sustain and sostenuto pedals so they are NOT compatible with the Yamaha FC-3. Therefore I would conclude that continous sustain that the Yamaha pedal would be used for is NOT supported.

You hold down the function key/button and then use the PIANO keys with the "tempo" shown above them.
In that section of the keyboard, the C# key raises the tempo and the C key lowers it. You can also use the numbered keys in that section to dial up a particular value. Hold function down and strike the numbers you want then release the function key/button

I don't believe there is an adjustment for loudness of the metronome other than the overall loudness of the piano..