I'm always reluctant to recommend brute force, BUT...

I have sometimes found that if you insert a thin flat blade, such as a blunt kitchen knife, just between the side of the tray door and the iLamp body, and give it a little physical persuasion while it is carrying on with its KERthumping, the tray will magically come to its senses and eject. This may be just momentary and it may immediately try to close again unless you physically hang on to it.

When I have had that problem on iLamps, it has usually been one of three things:

a) There is a mechanical jam in the tray mechanism

B) IDE cable has worked partially loose from the motherboard or the CDROM end, or

c) The PSU is underperforming and resets each time the tray eject motor tries to start up

Of course,it could be something else

Either way, sounds like your Lamp is due for a good clean out and internal inspection. Disassembly is not too painful, really.. The only essential consideration is restoring the thermal grease heat transfer between upper and lower case when you reassemble.

Rick