You will probably need to perform a firmware upgrade. That particular error code 'AB FFD0E6' is one that Philips claim can be overcome by this.
Please read the sticky thread on "Philips firmware upgrades, downgrades", at the top of the forum. This should help you to provide the following information:
1) How to open the tray mechanically (instructions at bottom of the text). This is necessary to see whether there is a disc already inside.
2) A link to download the latest firmware version from the Philips site.
3) How to burn a CD and perform the upgrade.
For starters, let us know your DVDR985 country code number (presumably DVDR985/17), and whether you can get the tray open using the tab slot.