Headphone doesn work with casio px150 phone plug

you need a competent repair technician to look at it and test things.

Yes that is sure likely to be the reason as when the headphones are plugged in the audio is disabled to the device speaker

No, the switching is done by the headphone jack. However if you replace the headphone jack itself ou can install one that makes them both on at the same time but then you couldn't switch the speakers off. Or you can wire a switch into the circuit to do it.

Check it again. It may have something dragging on the key, maybe something sticky like soda or juice residue. You can also try swapping out the key with another C or F key that is less used. Good luck!

Fixing the keys on digital piano. try to watch the video maybe there is a tips to fix your piano. thanks

I assumed you mean a PX150. Here is a link to a manual for that but I found nothing for a privia 150. It looks here to me on page 19 that you choose track 1 or 2 which seems to be left or right and if you start new recording on one of them, it deletes what was there.

http://www.fixya.com/answer/answerpageslideview.aspx?ctg=249&fml=0&brd=0&p=7&ctrl=mnf&thid=23710754

YES. Either plug in headphones into the headphone socket. There should be a switch on the back which disables the speakers as well. A simple ON/OFF switch for speakers

Plug a set of headphones into one of the PHONES jacks on the left side of the unit.

The keyboard has a mic jack that is the same size as the headphones. You probably put the headphone plug into the wrong jack is all.

It is important that your headphones are STEREO tyoe as a monaural 1/4 inch plug will short out one side of the output audio.

Make sure the plug is fully seated as it has a switch in the unit that disconnects the speakers typically when headphones are plugged in.

If your speakers do not get cut off when you plug in the headphones, it is POSSIBLLE that the switches on the jack have been broken. This would require servicing.