Hi Savai and welcome to the forum :flower:.
Could you let us know what the country code of your 985 is? It will be the suffix after the model number i.e. DVDR985/xxx. This way I can at least point you to a pdf of the manual :).
There are some instructions (click here) at the bottom of the sticky thread on the main Philips sub-forum page, that will tell you how to get the tray open (forget point '1' and the bit in '2' about having a disc in the unit):
*A more detailed procedure for manual opening of the tray on the HDRW72x, DVDR98x, 7x and 61x:
- Before starting, make sure you have burned a CD with the firmware you want to downgrade to.>
- Make sure there is no disc in the unit. Some models have a slot at the bottom of the unit that can be used to open the tray if it refuses to open normally*. >
- Switch off the unit at the wall plug.>
- On the front panel, hold in the <RECORD> and <EJECT> buttons at the same time, and keeping them held, switch on the power at the wall again. Keep holding the buttons until the disc tray opens.>
There should be a small slot on the lower side of the unit near the front and center of the disc assembly. By sliding a small plastic numb from one side to the other unlocks the door so it can maually be opened the rest of the way. You will need a strong, thin object to slide that release nub. A small knife or nail would work. Of course you should follow all safety precaution such as removing power and not damaging anything else.
A couple of other questions: Has the machine just suddenly displayed this error message, or have you had problems before? Do you know what firmware there is already on the machine?