ps2 disc tray won't close -- strange problem

[tomprez]

i am having an issue with my ps2 not staying closed. when i turn it on, it immediately opens (at regular speed) and when i press the eject button to close it, it closes only to open right back up again. the discs don't spin and i am not sure if that's because it isn't closed or if i blew something. the eject button is not jammed, the silver ribbon is connected, the disc tray is on track and the lens is clean and i have no idea what the hell to do from here. anyone know why the disc tray would do this??

details about my ps2:

this is an old ps2 that i bought years ago, it is not modded
the model number is scph-30001

any help at all would be greatly appreciated