Interestingly and surprisingly, from Philips:

"Recently you have asked us about the on/off codes for yoru Philips TV.

I have forwarded you request to the tech departement where it will be
handled regarding the CCF file.

In the meantime, be sure to have loaded the latest codes from
www.pronto.philips.com as the code for your TV is known to be :

1522

This codeset should include the on/off button as well."