Problem With Philips Dvdr3365

Hi all.

Sorry if this is a recurring problem but does anybody know how to fix a BLOCKED Philips DVDR3365? I’ve tried unplugging it and powering up whilst holding down standby, whilst holding down play and stop and pretty much every other combination of buttons I could think of. Have also reset to factory settings using the remote. Have only owned a few months but no longer have the receipt. Any other suggestions short of sledge hammer?

Matt