The below technique apparently works for quite a lot of the Philips players and in particular the Philips DVDR3570H + Philips DVDR70 - so it must be worth trying for your unit:
1. Turn on the player from the front panel (without a disc inserted)
2. Press TUNER or the blue button
* (or open the HDD browser)
3. Press PLAY
4. Enter 159 121 212 005 255
5. Press PLAY
6. Turn the player off
I`ve not tried it so obviously use at your own risk, but it would be helpful to post below to let others know if it works or not :)