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Can’t open door of DVD RW Drive on desktop PC

My computer is an “emachine”. The brand of the device is ATAPI DVD A DH16AASH SCSI CdRom Device. Door to the drive is vertical (side ways).It used to open very well. I’ve hardly used it, so it’s not worn out. There is no pinhole on it’s “face”, so the paperclip solution isn’t possible. It seems like the problem is a mechanical issue w/in the “tower”. On the screen under device properties it says that the device is working properly. I’m not a computer wiz, so I’m reluctant to open it up & mess w/the hardware. I imagine that if I took it to a computer tech, it would be expensive! What can I do?